SIST EN 152:2012
(Main)Wood preservatives - Determination of the protective effectiveness of a preservative treatment against blue stain in wood in service - Laboratory method
Wood preservatives - Determination of the protective effectiveness of a preservative treatment against blue stain in wood in service - Laboratory method
This European Standard specifies a method which is only suitable for testing preparations and systems which are intended to prevent the occurrence of blue stain fungi in wood in service. It is not suitable for assessing the temporary preventive effectiveness of anti-stain preservatives on round wood or on freshly cut wood. The method is not intended for the determination of the fungicidal properties of the surface coating applied to the wood after the priming coat. This European Standard lays down a method for determining the effectiveness of a preparation applied by e.g. brushing, spraying, spraying tunnel, dipping or vacuum and pressure treatments resulting in an equivalent retention of product in preventing the development of blue stain fungi in wood in service. It is also applicable where a primer paint is used in conjunction with the preservative system.This method is applicable to the following types of preparations or systems: Type A: fungicidal preparations with or without pigment, used in conjunction with unspecified varnishes or paint coatings;or Type B: fungicidal preparations with or without pigment, used in conjunction with specified varnishes or paint coatings;or Type C: fungicidal preparations with or without pigment, used without subsequent varnish or paint coating (e.g. stains).
Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit einer Schutzbehandlung von verarbeitetem Holz gegen Blaüepilze - Laboratoriumsverfahren
Diese Europäische Norm legt ein Verfahren fest, das nur zur Prüfung von Schutzmitteln und Systemen geeignet ist, die einen Bläuepilzbefall an verarbeitetem Holz verhindern sollen. Sie ist dagegen nicht zur Beurteilung der temporären vorbeugenden Wirksamkeit von bläuewidrigen Holzschutzmitteln auf Rundholz oder auf frisch eingeschnittenem Holz geeignet. Das Verfahren ist nicht zur Bestimmung der fungiziden Eigenschaften der im Anschluss an eine Grundierung auf die Holzoberfläche aufgebrachten Oberflächen-beschichtung vorgesehen.
Diese Europäische Norm legt ein Verfahren für die Bestimmung der Wirksamkeit eines Schutzmittels zur Schutzbehandlung von verarbeitetem Holz gegen Bläupilze fest, das z. B. durch Streichen, Sprühen, mit dem Sprühtunnel , Kurztauchverfahren oder durch Vakuum und Druckbehandlungen aufgebracht wird, mit denen eine gleichwertige Schutzmittelaufnahme erzielt wird. Es kann auch für eine Erstbeschichtung (primer paint) angewendet werden, die in Verbindung mit einem Holzschutzsystem eingesetzt wird ).
Dieses Verfahren ist für die folgenden Typen der Präparate und Systeme geeignet:
Typ A: fungizide Präparate mit oder ohne Pigment, die in Verbindung mit beliebigen Lack- oder Farb-beschichtungen angewendet werden;
oder
Typ B: fungizide Präparate mit oder ohne Pigment, die in Verbindung mit bestimmten Lack- oder Farb-beschichtungen angewendet werden;
oder
Typ C: fungizide Präparate mit oder ohne Pigment, die ohne anschließenden Lack- oder Farb-beschichtungen angewendet werden (z. B. Färbemittel).
ANMERKUNG Es ist auch möglich, die Wirksamkeit zur Vermeidung der Bläue beim Einsatz eines kombinierten Schutzsystems zu prüfen, das die Anwendung eines Präparates durch ein Tränkverfahren und anschließende Anwendung eines anderen Präparates durch ein Verfahren der Oberflächenbehandlung umfasst.
Produits de préservation du bois - Détermination de l'efficacité préventive d'un traitement de protection du bois mis en œuvre contre le bleuissement fongique - Méthode de laboratoire
La présente Norme européenne spécifie une méthode d'essai qui n'est adaptée qu'aux préparations et
systèmes destinés à prévenir l'apparition du bleuissement fongique dans le bois mis en oeuvre. Elle n'est pas
adaptée à l'évaluation de l'efficacité préventive temporaire de produits de préservation appliqués sur des bois
ronds ou des bois fraîchement débités contre les agents de discoloration. La méthode n'est pas destinée à
déterminer les propriétés fongicides d'une couche de finition appliquée après application d’un produit
d’impression (primaire) sur le bois.
La présente Norme européenne établit une méthode de détermination de l'efficacité d'une préparation
appliquée, par exemple, par brossage, aspersion, aspersion sous tunnel, trempage ou traitements sous vide
et sous pression, donnant des rétentions de produit équivalentes, dans la prévention du développement du
bleuissement fongique dans le bois mis en oeuvre. Elle est également applicable lorsqu'une couche
d'impression (primaire) est employée en corrélation avec un système de préservation1).
Cette méthode est applicable aux types suivants de préparations ou de systèmes :
- type A : préparations fongicides avec ou sans pigment, utilisées avec des couches de vernis ou de
peinture non spécifiés ;
ou
- type B : préparations fongicides avec ou sans pigment, utilisées avec des couches de vernis ou de
peinture spécifiés ;
ou
- type C : préparations fongicides avec ou sans pigment, utilisées sans couche ultérieure de vernis ou de
peinture (par exemple, teintures).
NOTE Il est également possible de déterminer l'efficacité préventive contre le bleuissement d'un bois mis en oeuvre
d'un système mixte de préservation qui prévoit l'application d'une préparation au moyen d'une technique de traitement par
imprégnation, suivie de l'application ultérieure d'une autre préparation par une méthode de traitement superficielle.
Zaščitna sredstva za les - Ugotavljanje preventivne učinkovitosti zaščitnega sredstva proti glivam modrivkam - Laboratorijska metoda
Ta evropski standard določa metodo, ki je ustrezna le za preskušanje pripravkov in sistemov za preprečevanje gliv modrivk v uporabljenem lesu. Ni primeren za ocenjevanje začasne preventivne učinkovitosti zaščitnih sredstev proti glivam na okroglem ali sveže posekanem lesu. Metoda ni namenjena za ugotavljanje fungicidnih lastnosti površinskega premaza, ki se na les nanese po osnovnem premazu.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit einer Schutzbehandlung von verarbeitetem Holz gegen Blaüepilze - LaboratoriumsverfahrenProduits de préservation du bois - Détermination de l'efficacité préventive d'un traitement de protection du bois mis en œuvre contre le bleuissement fongique - Méthode de laboratoireWood preservatives - Determination of the protective effectiveness of a preservative treatment against blue stain in wood in service - Laboratory method71.100.50Wood-protecting chemicalsICS:Ta slovenski standard je istoveten z:EN 152:2011SIST EN 152:2012en,fr,de01-februar-2012SIST EN 152:2012SLOVENSKI
STANDARDSIST EN 152-2:1996/AC1:2002SIST EN 152-2:1996SIST EN 152-1:19961DGRPHãþD
SIST EN 152:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 152
November 2011 ICS 71.100.50 Supersedes EN 152-1:1988, EN 152-2:1988English Version
Wood preservatives - Determination of the protective effectiveness of a preservative treatment against blue stain in wood in service - Laboratory method
Produits de préservation du bois - Détermination de l'efficacité préventive d'un traitement de protection du bois mis en œuvre contre le bleuissement fongique - Méthode de laboratoire
Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit einer Schutzbehandlung von verarbeitetem Holz gegen Blaüepilze - Laboratoriumsverfahren This European Standard was approved by CEN on 24 September 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 152:2011: ESIST EN 152:2012
EN 152:2011 (E) 2 Contents Page Foreword .4Introduction .51 Scope .62 Normative references .63 Terms and definitions .74 Principle .75 Test materials .85.1 Biological material .85.2 Products and reagents .85.3 Apparatus . 105.4 Other material . 116 Sampling . 117 Test specimens . 117.1 Species of wood. 117.2 Wood quality . 127.3 Preparation of sticks and blocks . 127.4 Preparation of test specimens . 137.5 Number of test specimens . 138 Procedure . 148.1 Treatment of the wood test specimens . 148.2 Pre-conditioning of the test specimens prior to fungal test . 178.3 Fungal test . 178.4 Test conditions and duration of test. 188.5 Assessment of the test specimens . 189 Validity of results . 1910 Reporting the results . 2011 Test report . 20Annex A (normative)
Detailed information on coating products . 22A.1 General . 22A.2 Alkyd coating material for organic solvent based preparations (5.2.2.2) . 22A.3 Acrylic coating material for water based preparations (5.2.2.3) . 24Annex B (normative)
Preparation of a spore suspension of the test fungi . 27Annex C (informative)
Information regarding sterilisation procedures . 28C.1 Ionising irradiation. 28C.2 Steam . 28Annex D (informative)
Figures on equipment and diagrams . 29Annex E (informative)
Instructions on the test procedure . 34Annex F (normative)
Artificial weathering cycle . 36F.1 Introduction . 36F.2 Apparatus – minimum requirements . 36F.3 Weathering cycles . 37F.4 Criteria to select weathering cycles. 42F.5 Conditioning . 42SIST EN 152:2012
EN 152:2011 (E) 3 Annex G (informative)
Example of a test report . 43Annex H (informative)
Environmental, health and safety precautions within chemical/biological laboratory . 44Bibliography . 45 SIST EN 152:2012
EN 152:2011 (E) 4 Foreword This document (EN 152:2011) has been prepared by Technical Committee CEN/TC 38 “Durability of wood and wood-based products”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 152-1:1988, EN 152-2:1988. Significant technical differences between this standard and EN 152-1 and EN 152-2:1988 are as follows: a) introduction of a new harmonised specification for the test specimens used in the diverse biological tests; b) merging of Part 1 relating to the brushing procedure and Part 2 concerning the application by methods other than brushing; c) taking into account of the terms given in EN 1001-1 and the definitions of EN 1001-2; d) introduction of an informative Annex to take account of consideration for minimisation of environmental and health hazards caused by the use of this biological test. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 152:2012
EN 152:2011 (E) 5 Introduction The test method described in this European Standard is a laboratory method combined with pre-conditioning (natural or artificial weathering), which provides a basis for assessment of the effectiveness of a wood preservative or wood preservative systems in preventing the development of blue stain fungi in wood in service where disfigurement can be considered important, such as external decorative timber and joinery. The method permits the determination of the effectiveness of undiluted preservatives and may also be used to test preparations in which the proportions of the individual components (active ingredients) have been varied and so establish for the active ingredients the limit of their effectiveness. It should be used to assess the value of the protection, taking into account the method of application and in particular the suppliers specifications. It is recommended that the results of these tests should be supplemented by further suitable tests and especially by practical experience. Suitable precautions should include the use of separate rooms, areas within rooms, extraction facilities, conditioning chambers and special training for personnel (also see Annex H for environmental, health and safety precautions). SIST EN 152:2012
EN 152:2011 (E) 6 1 Scope This European Standard specifies a method which is only suitable for testing preparations and systems which are intended to prevent the occurrence of blue stain fungi in wood in service. It is not suitable for assessing the temporary preventive effectiveness of anti-stain preservatives on round wood or on freshly cut wood. The method is not intended for the determination of the fungicidal properties of the surface coating applied to the wood after the priming coat.
This European Standard lays down a method for determining the effectiveness of a preparation applied by e.g. brushing, spraying, spraying tunnel, dipping or vacuum and pressure treatments resulting in an equivalent retention of product in preventing the development of blue stain fungi in wood in service. It is also applicable where a primer paint is used in conjunction with the preservative system1). This method is applicable to the following types of preparations or systems:
type A: fungicidal preparations with or without pigment, used in conjunction with unspecified varnishes or paint coatings; or type B: fungicidal preparations with or without pigment, used in conjunction with specified varnishes or paint coatings; or type C: fungicidal preparations with or without pigment, used without any subsequent paint, varnish or other coating. NOTE It is also possible to test the effectiveness in preventing blue stain in service of a combined protective system which involves the application of one preparation by a penetrating treatment technique followed by a subsequent application of a different preparation by a superficial treatment method. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 927-6:2006, Paints and varnishes — Coating materials and coating systems for exterior wood — Part 6: Exposure of wood coatings to artificial weathering using fluorescent UV lamps and water EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
1) The method may also be used for first coat (primer) paints required to give protection during storage of components on-site (see Annex E). These are tested as for preparations of type C. SIST EN 152:2012
EN 152:2011 (E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 representative sample sample having its physical and/or chemical characteristics identical to the volumetric average characteristics of the total volume being sampled [EN 1001-2, 4.71] 3.2 supplier sponsor of the test (person or company providing the sample of wood preservative to be tested) [Adapted from EN 1001-2, 4.83] 4 Principle The basic principles of the test method are to provide the conditions for infection by blue stain fungi into the treated face and into the cut surface behind the treated face (for surface treatments) and to observe the development of infection into the treated face.
A series of blocks of the given timber species are treated with the preparation under test on all faces except the end-grain faces. Subsequently the blocks are cut in the direction of the grain such that two specimens are produced. The treatment differs according to the type of preparation (Annex E, Table E.1) and specifications for its use: Type A
Preparations designed to be used with unspecified varnish or paint coatings are tested using the application rate appropriate to the preparation (Annex E, Table E.2) or as otherwise specified by the supplier followed by the standard test varnish. Type B
Preparations designed to be used with specified varnish or paint coatings are tested using the application rate appropriate to the preparation (Annex E, Table E.2) or as otherwise specified by the supplier followed by a surface coating strictly according to the supplier's specification. Type C Preparations designed to be used without subsequent varnish or paint coatings are tested using the application rate appropriate to the product (Annex E, Table E.2) or as otherwise specified by the supplier but with no subsequent application of coating. Treated test specimens are exposed to pre-conditioning (natural or artificial weathering).
Weathered test specimens are then exposed in the laboratory to the action of a mixed culture of two fungi causing blue stain in service.
NOTE Preparations designed to be used solely in use class 2 (EN 335) may be preconditioned by using the evaporative aging method in EN 73 in place of the natural or artificial weathering procedures in this standard. SIST EN 152:2012
EN 152:2011 (E) 8 5 Test materials 5.1 Biological material The test fungi to be used in all tests are2) Aureobasidium pullulans (de Bary) Arnaud, strain P 2683), source Hann. Münden; Sydowia polyspora (Bref. & Tavel) E. Müller (syn. Sclerophoma pithyophila (Corda) v. Höhnel) strain S 2314), source Hann. Münden. Use the test fungi as a mixed culture in the form of a spore suspension. The technique for the preparation of this spore suspension is described in Annex B.
NOTE If desired, spore suspensions of other blue stain fungi of national importance can be used in additional series of tests. The type and extent of the growth of these fungi are to be described in the test report.
5.2 Products and reagents 5.2.1 Nutrient medium A nutrient medium of malt buffered to pH 4,2 shall be used for the preparation of a spore suspension (see 8.3.4) of the test fungi. It shall contain 20 g/l dried malt or an equivalent amount of concentrated malt extract with a nitrogen content of mass fraction of (0,9 ± 0,3) %. The buffer shall be a citrate buffer solution composed of: Citric acid monohydrate, 12,5 g; (analytical reagent grade) 1 mol/l NaOH 120 ml; 0,1 mol/l HCl 390 ml; water to make up 1 000 ml. 5.2.2 Coating material 5.2.2.1 General Tests can be performed for a specific coating material which has been specified by the supplier.
Otherwise a generic coating material can be used as detailed under 5.2.2.2 and 5.2.2.3 below.
2) Maintain the strains on 2 % malt agar and subculture them at intervals not exceeding 6 months. Obtain new cultures if there is evidence of degeneration such as loss of pigmentation or the ability to produce conidia. Cultures can be obtained from Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin or from the CABI Bioscience, Bakeham Lane, Egham, Surrey TW20 9TY UK. 3) Identical to strain no. IMI 269 216 of culture deposited at CABI Bioscience, Egham. 4) Identical to strain no. IMI 269 217 of culture deposited at CABI Bioscience, Egham. SIST EN 152:2012
EN 152:2011 (E) 9 5.2.2.2 For organic solvent preservative products An unpigmented varnish based on low viscosity, long oil alkyd resin, with driers and without any fungicidal or fungistatic components (see A.2). Two options are provided whether or not UV protection is present. NOTE The varnish may be stored unopened for up to 2 years, but once the container has been opened, unused quantities should not be stored longer than 1 week for further use. 5.2.2.3 For waterborne preservative products An unpigmented varnish based on low viscosity acrylic resin, with an in-can preservative for the resin (see A.3). NOTE The varnish may be stored unopened for up to half a year, but once the container has been opened, unused quantities should not be stored longer than 1 week for further use. 5.2.3 Test product without active ingredients If additional controls are requested, the product under test without the active ingredient(s) (see 7.5.2). 5.2.4 Solvents and diluents 5.2.4.1 White spirit For the characteristics of the white spirit see Annex A (A.2.1.2). 5.2.4.2 Water Complying with grade 3 of EN ISO 3696. 5.2.5 End sealer The end sealer is necessary to prevent the product penetrating along the end grain. Any appropriate material which is resistant to the solvents employed during treatment. A material resistant to the penetration of the test product and the test fungi, or separate materials for each, and without any fungistatic or fungicidal activity within the test specimen. NOTE Three brush coats of a 2-component epoxy lacquer, with drying between each application, have been found to be suitable. 5.2.6 Sterilant (see 8.3.2) Access to radiation sterilisation facilities or autoclave available. 5.2.7 Hydrated, laminar, aluminium-iron-magnesium silicate (e.g. vermiculite) Exfoliated to give particles of 1 mm to 3 mm with an apparent density of 80 kg/m3 to 90 kg/m3. Particles of less than 1 mm shall be eliminated by sieving prior to use.
NOTE The water holding capacity of the vermiculite should allow the wood moisture content to stay below 100 % at any time. 5.2.8 Reference product The reference product used shall comply with the composition or equivalent specified in Table 1. SIST EN 152:2012
EN 152:2011 (E) 10 Table 1 — Composition of the reference product Component b) Quantity (mass fraction in %) Vialkyd VAF 4349/80 K-60 5,00 Dowanol PM 3,00 Preventol A 4 S (87,5 – 92,5 % DCFN a) 0,55 (approx. 0,49 DCFN) Methylethylketoxim 0,20 Octa Soligen Trockner 69 0,10 Shellsol D 60 91,15 a
DCFN = dichlofluanide. b
Example(s) of suitable product(s) available commercially. This information is given for the convenience of users of this EN 152 standard and does not constitute an endorsement by CEN of these products. The product containing dichlofluanide at this concentration shall be applied at 80 g/m² in combination with a varnish coating. If an alternative reference product is used, the concentration chosen should provide a performance equivalent to the specified concentration of DCFN. Evidence of equivalence shall be recorded in the test report.
5.2.9 Fumigant (if necessary) Xylene technical grade. 5.3 Apparatus 5.3.1 Incubation room, with the following climatic conditions: (22 ± 2) °C and (70 ± 5) % relative humidity.
5.3.2 Conditioning room at (20 ± 2) °C and (65 ± 5) % relative humidity. 5.3.3 Saw with blades giving a fine-sawn finish 5.3.4 Weathering site for open air weathering of wood specimens in special racks : weathering racks: frames to take the wood specimens at 45° (see Figure D.5). The frames shall be constructed of inert material (e.g. plastics, aluminium). In the racks the wood test specimens shall be free on all sides and be secured against being dislodged; as a weathering site, any free area without extremes of environmental conditions with regard to humidity, dryness, UV radiation or industrial pollution is suitable. The site shall be free from tall vegetation (max. 0,5 m); erection of the weathering racks, the following are to be observed: they shall at no time be in the shade of trees, houses or other structures; the wood test specimens shall face the direction in which the exposure conditions are expected to be most severe; NOTE In Central Europe and France this is to the South West and in the UK to the South. the wood test specimens shall be placed 1 m to 2 m above the ground . SIST EN 152:2012
EN 152:2011 (E) 11 5.3.5 Device for artificial weathering (UV equipment with spray option, UVS) A device providing spray of demineralised water of approximately 4 l/min and UV-light at a wave length of 340 nm (UVA), preferable produced by fluorescent tubes, programmable for different weathering cycles including alternating UV-radiation, spraying and condensation of different duration and controllable temperature during the radiation and the condensation periods.
5.3.6 Culture vessels with a capacity of 400 cm3 to 600 cm3 and an internal area of base of 90 cm2 to 120 cm2 (see Annex D for an example of a culture vessel). 5.3.7 Sterilisers access to ionising-radiation services (Annex C); autoclave, adjustable at (102 ± 2) °C and (121 ± 1) °C, and, if the autoclave is not adjustable at (102 ± 2) °C , a steaming chamber (Annex C).
5.3.8 Measuring magnifying glass with reading accuracy of 0,1 mm. 5.3.9 Usual laboratory equipment, especially: analytical balance with accuracy 0,01 g. various brushes. abrasive paper, grit size 120 and 180. drying oven, adjustable at (103 ± 2) °C. 5.4 Other material Corrosion resistant nails of length of approx. 30 mm and diameter of approx. 1,5 mm to support wood specimens during weathering (see Figure D.3).
6 Sampling The sample of preservative shall be representative of the product to be tested. Samples shall be stored and handled in accordance with any written recommendations from the supplier. NOTE For the sampling of preservatives from bulk supplies, the procedure given in EN 212 should be used. 7 Test specimens 7.1 Species of wood A species of wood that is very susceptible to blue stain shall be used:
obligatory for every test is Scots pine sapwood (Pinus sylvestris Linnaeus). NOTE Additional tests may be carried out using other species but, if so, this should be stated in the test report. SIST EN 152:2012
EN 152:2011 (E) 12 7.2 Wood quality Sound, straight grain, knot-free and uniformly grown wood shall be used exclusively. The wood shall be stain-free. Wood with a resinous appearance shall be avoided.
Wood from the top of the trunk or the lowest 1 m of the trunk is unsuitable.
Exclusively sapwood shall be used showing a rate of growth of: 2,5 to 8 annual rings per 10 mm.
The proportion of latewood shall be less than 30 %. The wood shall not have been floated, stored in water, heated above 60 °C or treated with chemicals.
Only winter felled trees shall be used which are converted to boards immediately after felling. When requirements of wood quality on the history of the material cannot be verified, the wood batch shall be tested for fungal infection susceptibility using the procedure described in 8.3 on non- weathered specimens and validated according to Clause 9, 1st paragraph. Wood specimens shall be selected at random and they shall represent 1 % of the batch. NOTE
Air drying of the boards is possible but under inappropriate conditions rapid infection with blue stain fungi may occur. Therefore careful kiln drying at temperatures up to 60 °C is preferred.
Storage of derived test specimens shall not normally exceed 3 years from felling of the trees as this might influence the validity of the test. 7.3 Preparation of sticks and blocks Unseasoned wood (sticks) shall be dried carefully to a moisture content of (12 ± 2) %. Prepare sticks of approximately 50 mm × 35 mm cross section with the annual rings forming an angle of (45 ± 15)° with the edges. Number the sticks and mark them at the cross sections to be able to identify the trunk from which they are cut. Plane the sticks to a cross section of 40 mm × 25 mm and round the longitudinal edges with a moulding knife to a radius of curvature of 2 mm.
From these sticks cut blocks free from knots and defects (resin galls etc.) 110 mm long and mark them with the number of the stick in a way that the numbering is detectable after treatment. Smooth the rounded edges and the face except the end grain faces with sandpaper grit size 120 and clean off sanding dust.
Store the blocks in the conditioning room (5.3.2) until use. Take blocks from at least 3 different trees for the test of each preparation.
In Annex D, Figure D.2 detailed drawings are given in relation to the preparation of sticks and blocks.
NOTE 1 If it is recommended that the product under test should be applied by brushing only, it may be suitable to cut the blocks prior to treatment in order to give test specimens described under 7.4.1. NOTE 2 If it is recommended that the product under test should be applied by spraying or dipping, it may be suitable to use only the upper part (representing the face closest to the outer part of the tree) of the treated block in order to give test specimens described under 7.4.1. SIST EN 152:2012
EN 152:2011 (E) 13 7.4 Preparation of test specimens 7.4.1 Treated test specimens These treated test specimens are cut from treated blocks (8.1.3.2) after drying (8.1.5). Cut the blocks lengthwise with a saw blade which gives fine saw finishes, each to give two treated test specimens the dimensions of which at (12 ± 2) % moisture content shall be: (110 ± 0,5) mm (grain direction) × (40 ± 0,5) mm × (10 ± 0,5) mm. NOTE 1 In the case of treatment by brushing the treated test specimens may be cut prior to treatment (8.1.3.2). NOTE 2 Longer treated test specimens (e.g. 30 cm) can be cut after weathering as long as this still relates to the same sampling. 7.4.2 Control test specimens These control test specimens are cut from untreated blocks in the same way as the treated test specimens. The dimensions of these control test specimens at (12 ± 2) % moisture content shall be the same as those of the treated ones (7.4.1). 7.5 Number of test specimens 7.5.1 Treated test specimens For each concentration of the preservative under test 3 blocks (1 from each of 3 trees) to be treated shall be used to giv
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SLOVENSKI STANDARD
oSIST prEN 152:2010
01-marec-2010
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Wood preservatives - Determination of the protective effectiveness of a preservative
treatment against blue stain in wood in service - Laboratory method
Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit einer Schutzbehandlung
von verarbeitetem Holz gegen Blaüepilze - Laboratoriumsverfahren
Produits de préservation du bois - Détermination de l'efficacité préventive d'un traitement
de protection du bois mis en œuvre contre le bleuissement fongique - Méthode de
laboratoire
Ta slovenski standard je istoveten z: prEN 152
ICS:
71.100.50 .HPLNDOLMH]D]DãþLWROHVD Wood-protecting chemicals
oSIST prEN 152:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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prEN 152
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2010
ICS 71.100.50 Will supersede EN 152-1:1988, EN 152-2:1988
English Version
Wood preservatives - Determination of the protective
effectiveness of a preservative treatment against blue stain in
wood in service - Laboratory method
Produits de préservation du bois - Détermination de Holzschutzmittel - Bestimmung der vorbeugenden
l'efficacité préventive d'un traitement de protection du bois Wirksamkeit einer Schutzbehandlung von verarbeitetem
mis en œuvre contre le bleuissement fongique - Méthode Holz gegen Blaüepilze - Laboratoriumsverfahren
de laboratoire
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 38.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 152:2010: E
worldwide for CEN national Members.
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Contents Page
Foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Principle .7
5 Test materials .8
5.1 Biological material .8
5.2 Products and reagents .8
5.2.1 Nutrient medium .8
5.2.2 Coating material .8
5.2.3 Priming coating material for control test specimens .9
5.2.4 Solvents and diluents .9
5.2.5 End sealer .9
5.2.6 Sterilant (see 9.3.2) .9
5.2.7 Hydrated, laminar, aluminium-iron-magnesium silicate (e.g. vermiculite) .9
5.2.8 Reference product .9
5.2.9 Fumigant (if necessary) . 10
5.3 Apparatus . 10
5.4 Other material . 11
6 Sampling . 11
7 Test specimens . 11
7.1 Species of wood. 11
7.2 Wood quality . 12
7.3 Preparation of sticks and blocks . 12
7.4 Preparation of test specimens . 12
7.4.1 Treated test specimens . 12
7.4.2 Control test specimens . 13
7.5 Number of test specimens . 13
7.5.1 Treated test specimens . 13
7.5.2 Control test specimens . 13
7.5.3 Validation test specimens . 13
8 Procedure . 14
8.1 Treatment of the wood test specimens . 14
8.1.1 Conditioning of the wood test specimens before preservative treatment . 14
8.1.2 Sealing of the end surfaces . 14
8.1.3 Application of test preparation to the wood test specimens . 14
8.1.4 Treatment of the additional control test specimens C and validation test specimens . 15
2
8.1.5 Drying the blocks after treatment . 15
8.1.6 Preparation of test specimens . 16
8.1.7 Insertion of nails . 16
8.1.8 Coating the wood specimens . 16
8.2 Pre-conditioning of the test specimens prior to fungal test . 17
8.2.1 Natural weathering. 17
8.2.2 Artificial weathering . 17
8.2.3 Storing of control test specimens. 17
8.3 Fungal test . 17
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8.3.1 Preparation of the test specimens . 17
8.3.2 Sterilisation of the test specimens . 17
8.3.3 Preparation of the culture vessels . 17
8.3.4 Introduction and inoculation of the test specimens . 18
8.4 Test conditions and duration of test . 18
8.5 Assessment of the test specimens . 18
8.5.1 General . 18
8.5.2 Assessment of the test specimen surface. 18
8.5.3 Assessment of the interior of the test specimens . 19
9 Validity of results . 19
10 Reporting the results . 19
11 Test report . 20
Annex A (normative) Detailed information on coating products . 22
A.1 General . 22
A.2 Alkyd coating material for organic solvent based preparations (5.2.2.1) . 22
A.2.1 Basic components of alkyd varnish . 22
A.2.2 Composition of the coating material . 24
A.3 Acrylic coating material for water based preparations (5.2.2.2) . 24
A.3.1 Basic components of acrylic coating . 24
A.3.2 Composition of the water based stain varnish (exterior) . 26
Annex B (normative) Preparation of a spore suspension of the test fungi . 27
Annex C (informative) Information regarding sterilisation procedures . 28
C.1 Ionising irradiation . 28
C.2 Steam . 28
Annex D (informative) Figures on equipment and diagrams . 29
Annex E (informative) Instructions on the test procedure . 34
Annex F (normative) Artificial weathering cycle. 36
F.1 Introduction . 36
F.2 Apparatus – minimum requirements . 36
F.3 Weathering cycles . 37
F.3.1 Artificial weathering cycle 1 . 38
F.3.2 Artificial weathering cycle 2 . 39
F.3.3 Artificial weathering cycle 3 . 41
F.4 Criteria to select weathering cycles . 42
F.5 Conditioning . 42
Annex G (informative) Example of a test report . 43
Annex H (informative) Environmental, health and safety precautions within chemical/biological
laboratory . 45
Bibliography . 46
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Foreword
This document (prEN 152:2010) has been prepared by Technical Committee CEN/TC 38 “Durability of wood
and wood-based products”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 152-1:1988, EN 152-2:1988.
Significant technical differences between this standard and EN 152-1 and 2:1988 are as follows:
a) introduction of a new harmonised specification for the test specimens used in the diverse biological tests;
b) merging of the Part 1 relating to the brushing procedure and the Part 2 concerning the application by
methods other than brushing;
c) taking into account of the terms given in EN 1001-1 and the definitions of EN 1001-2;
d) introduction of an informative Annex to take account of consideration for minimisation of environmental
and health hazards caused by the use of this biological test.
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Introduction
The test method described in this European Standard is a laboratory method combined with pre-conditioning
(natural or artificial weathering), which provides a basis for assessment of the effectiveness of a wood
preservative or wood preservative systems in preventing the development of blue stain fungi in wood in
service where disfigurement can be considered important, such as external decorative timber and joinery. The
method permits the determination of the effectiveness of undiluted preservatives and may also be used to test
preparations in which the proportions of the individual components (active ingredients) have been varied and
so establish for the active ingredients the limit of their effectiveness.
It should be used to assess the value of the protection, taking into account the method of application and in
particular the manufacturers specifications. It is recommended that the results of these tests should be
supplemented by further suitable tests and especially by practical experience.
Suitable precautions should include the use of separate rooms, areas within rooms, extraction facilities,
conditioning chambers and special training for personnel. (also see Annex H for environmental, health and
safety precautions).
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1 Scope
This European Standard specifies a method which is only suitable for testing preparations and systems which
are intended to prevent the occurrence of blue stain fungi in wood in service. It is not suitable for assessing
the temporary preventive effectiveness of anti-stain preservatives on round wood or on freshly cut wood. The
method is not intended for the determination of the fungicidal properties of the surface coating applied to the
wood after the priming coat.
This European Standard lays down a method for determining the effectiveness of a preparation applied by
e.g. brushing, spraying, spraying tunnel, dipping or vacuum and pressure treatments resulting in an equivalent
retention of product in preventing the development of blue stain fungi in wood in service. It is also applicable
1)
where a primer paint is used in conjunction with the preservative system .
This method is applicable to the following types of preparations or systems:
Type A: fungicidal preparations with or without pigment, used in conjunction with unspecified varnishes or
paint coatings;
or
Type B: fungicidal preparations with or without pigment, used in conjunction with specified varnishes or
paint coatings;
or
Type C: fungicidal preparations with or without pigment, used without subsequent varnish or paint coating
(e.g. stains).
NOTE It is also possible to test the effectiveness in preventing blue stain in service of a combined protective system
which involves the application of one preparation by a penetrating treatment technique followed by a subsequent
application of a different preparation by a superficial treatment method.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 1001-2, Durability of wood and wood-based products — Terminology — Part 2: Vocabulary.
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987).
EN 927-3:2004, Paints and varnishes — Coating materials and coating systems for exterior wood —
Part 3: Natural weathering test.
EN 927-6:2004, Paints and varnishes — Coating materials and coating systems for exterior wood —
Part 6: Exposure of wood coatings to artificial weathering using fluorescent UV lamps and water.
1) The method may also be used for first coat (primer) paints required to give protection during storage of components
on-site (see annex E). These are tested as for preparations of type C.
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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
representative sample
sample having its physical and/or chemical characteristics identical to the volumetric average characteristics
of the total volume being sampled.
[EN 1001-2, 4.71]
3.2
supplier
sponsor of the test (person or company providing the sample of wood preservative to be tested).
[Adapted from EN 1001-2, 4.83]
4 Principle
The basic principles of the test method are to provide the conditions for infection by blue stain fungi into the
treated face and into the untreated part behind the treated face and to observe the development of infection
into the treated face.
A series of blocks of the given timber species are treated with the preparation under test on all faces
except the end-grain faces. Subsequently the blocks are cut in fibre direction leading each to two
specimens with an untreated back. The treatment differs according to the type of preparation (clause 2)
(Annex E, Table E.1) and specifications for its use:
Type A Preparations designed to be used with unspecified varnish or paint coatings are tested using the
application rate appropriate to the preparation (Annex E, Table E.2) or as otherwise specified by the
manufacturer followed by the standard test varnish.
Type B Preparations designed to be used with specified varnish or paint coatings are tested using the
application rate appropriate to the preparation (Annex E, Table E.2) or as otherwise specified by the
manufacturer followed by a surface coating strictly according to the manufacturer's specification.
Type C Preparations designed to be used without subsequent varnish or paint coatings are tested using the
application rate appropriate to the product (Annex E, Table E.2) or as otherwise specified by the manufacturer
but with no subsequent application of coating.
Treated test specimens are exposed to pre-conditioning (natural or artificial weathering).
Weathered test specimens are then exposed in the laboratory to the action of a mixed culture of two fungi
causing blue stain in service.
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5 Test materials
5.1 Biological material
2)
The test fungi to be used in all tests are
3)
Aureobasidium pullulans (de Bary) Arnaud, strain P 268 , source Hann. Münden
Sydowia polyspora (Bref. & Tavel) E. Müller (syn. Sclerophoma pithyophila (Corda) v. Höhnel) strain S
4)
231 , source Hann. Münden
Use the test fungi as a mixed culture in the form of a spore suspension. The technique for the preparation of
this spore suspension is described in Annex B.
NOTE If desired, spore suspensions of other blue stain fungi of national importance can be used in additional series
of tests. The type and extent of the growth of these fungi are to be described in the test report.
5.2 Products and reagents
5.2.1 Nutrient medium
A nutrient medium of malt buffered to pH 4,2 shall be used for the preparation of a spore suspension (see
8.3.4) of the test fungi. It shall contain 20 g/l dried malt or an equivalent amount of concentrated malt extract
with a nitrogen content of mass fraction of (0,9 ± 0,3) % The buffer shall be a citrate buffer solution composed
of:
Citric acid monohydrate, 12,5 g
(analytical reagent grade)
1 mol/l NaOH 120 ml
0,1 mol/l HCl 390 ml
water to make up 1000 ml
5.2.2 Coating material
5.2.2.1 General
Tests can be performed for a specific coating material which has been specified by the supplier.
Otherwise a generic coating material can be used as detailed under 5.2.2.2 and 5.2.2.3 below.
2) Maintain the strains on 2 % malt agar and subculture them at intervals not exceeding 6 months. Obtain new cultures if
there is evidence of degeneration such as loss of pigmentation or the ability to produce conidia. Cultures can be obtained
from Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin or from the CABI Bioscience,
Bakeham Lane, Egham, Surrey TW20 9TY UK.
3) Identical to strain no. IMI 269 216 of culture deposited at CABI Bioscience, Egham.
4) Identical to strain no. IMI 269 217 of culture deposited at CABI Bioscience, Egham.
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5.2.2.2 For organic solvent preservative products
An unpigmented varnish based on low viscosity, long oil alkyd resin, with driers and without any fungicidal or
fungistatic components (see A.2). Two options are provided whether or not UV protection is present.
NOTE The varnish may be stored unopened for up to 2 years, but once the container has been opened, unused
quantities should not be stored longer than 1 week for further use.
5.2.2.3 For waterborne preservative products
An unpigmented varnish based on low viscosity acrylic resin, with an in-can preservative for the resin
(see A.3).
NOTE The varnish may be stored unopened for up to half a year, but once the container has been opened, unused
quantities should not be stored longer than 1 week for further use.
5.2.3 Priming coating material for control test specimens
The priming product under test without the active ingredient(s) (see Annex A).
5.2.4 Solvents and diluents
5.2.4.1 White spirit
For the characteristics of the white spirit see Annex A (A.2.1.2).
5.2.4.2 Water
Complying with grade 3 of EN ISO 3696.
5.2.5 End sealer
The end sealer is necessary to prevent the product to penetrate the end grain. Any appropriate material which
is resistant to the solvents employed during treatment. A material resistant to the penetration of the test
product and the test fungi, or separate materials for each, and without any fungistatic or fungicidal activity
within the test specimen.
NOTE Three brush coats of a 2-component epoxy lacquer, with drying between each application, have been found to
be suitable.
5.2.6 Sterilant (see 9.3.2)
Access to radiation sterilisation facilities or autoclave available.
5.2.7 Hydrated, laminar, aluminium-iron-magnesium silicate (e.g. vermiculite)
3 3
Exfoliated to give particles of 1 mm to 3 mm with an apparent density of 80 kg/m to 90 kg/m . Particles of less
than 1 mm shall be eliminated by sieving prior to use.
NOTE The water holding capacity of the vermiculite should allow the wood moisture content to stay below 100 % at
any time.
5.2.8 Reference product
The reference product used shall comply with the composition or equivalent specified in Table 1.
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Table 1 — Composition of the reference product
Quantity
Component
(mass fraction in %)
Vialkyd VAF 4349/80 K-60 5,00
Dowanol PM 3,00
a
0,55 (approx. 0,49 DCFN)
Preventol A 4 S (87,5 – 92,5 % DCFN
Methylethylketoxim 0,20
Octa Soligen Trockner 69 0,10
Shellsol D 60 91,15
a
DCFN = dichlofluanide.
2
The product containing dichlofluanide at this concentration shall be applied at 100 g/m . If an alternative
reference product is used, the concentration chosen should provide a performance equivalent to the specified
concentration of DCFN. Evidence of equivalence shall be recorded in the test report.
NOTE Trade names of products are examples of suitable products available commercially. This information is given
for the convenience of users of this EN 152 standard and does not constitute an endorsement by CEN of these products.
5.2.9 Fumigant (if necessary)
Xylene technical grade.
5.3 Apparatus
5.3.1 Incubation room, with the following climatic conditions: (22 ± 2) °C and (70 ± 5) % relative humidity.
5.3.2 Conditioning room at (20 ± 2) °C and (65 ± 5) % relative humidity.
5.3.3 Saw with blades giving a fine-sawn finish
5.3.4 Weathering site for open air weathering of wood specimens in special racks:
weathering racks: frames to take the wood specimens at 45° (see figure 3 in Annex D). The frames shall
be constructed of inert material (e.g. plastics, aluminium). In the racks the wood test specimens shall be
free on all sides and be secured against being dislodged.
as a weathering site, any free area without extremes of environmental conditions with regard to
...
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