SIST EN ISO 105-B02:1999
(Main)Textiles - Tests for colour fastness - Part B02: Colour fastness to artificial light: Xenon arc fading lamp test (ISO 105-B02:1994, including amendment 1:1998)
Textiles - Tests for colour fastness - Part B02: Colour fastness to artificial light: Xenon arc fading lamp test (ISO 105-B02:1994, including amendment 1:1998)
This part of EN 20105 specifies a method intended for determining the resistance of the colour of textile of all kinds and in all forms to the action of an artificial light source representative of natural daylight. The method is also applicable to white (bleached or optically brightened) textiles.
Textilien - Farbechtheitsprüfungen - Teil B02: Farbechtheit gegen künstliches Licht: Xenonbogenlicht (ISO 105-B02:1994, einschließlich Änderung 1:1998)
Dieser Teil von ISO 105 beschreibt ein Prüfverfahren zur Bestimmung der Widerstandsfähigkeit der Farbe von Textilien jeder Art und in allen Verarbeitungßuständen gegen die Einwirkung einer künstlichen Lichtquelle, die natürlichem Tageslicht (D65) entspricht. Das Prüfverfahren kann auch für weiße (gebleichte oder optisch aufgehellte) Textilien angewendet werden. Dieses Verfahren erlaubt den Gebrauch von zwei unterschiedlichen Reihen von blauen Lichtechtheitstypen aus Wollgewebe. Die mit den beiden unterschiedlichen Reihen erhaltenenErgebnisse stimmen nicht überein.
Textiles - Essais de solidité des teintures - Partie B02: Solidité des teintures a la lumiere artificielle: Lampe a arc au xénon (ISO 105-B02:1994, amendement 1:1998 inclus)
Tekstilije - Preskušanje barvne obstojnosti - Del B02: Preskušanje barvne obstojnosti na umetni svetlobi (preskus s ksenonsko svetilko) (ISO 105-B02:1994, vključuje Dopolnilo 1:1998)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 105-B02:1999
01-november-1999
1DGRPHãþD
SIST EN 20105-B02:1996
7HNVWLOLMH3UHVNXãDQMHEDUYQHREVWRMQRVWL'HO% 3UHVNXãDQMHEDUYQH
REVWRMQRVWLQDXPHWQLVYHWOREL SUHVNXVVNVHQRQVNRVYHWLONR ,62%
YNOMXþXMH'RSROQLOR
Textiles - Tests for colour fastness - Part B02: Colour fastness to artificial light: Xenon
arc fading lamp test (ISO 105-B02:1994, including amendment 1:1998)
Textilien - Farbechtheitsprüfungen - Teil B02: Farbechtheit gegen künstliches Licht:
Xenonbogenlicht (ISO 105-B02:1994, einschließlich Änderung 1:1998)
Textiles - Essais de solidité des teintures - Partie B02: Solidité des teintures a la lumiere
artificielle: Lampe a arc au xénon (ISO 105-B02:1994, amendement 1:1998 inclus)
Ta slovenski standard je istoveten z: EN ISO 105-B02:1999
ICS:
59.080.01 Tekstilije na splošno Textiles in general
SIST EN ISO 105-B02:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 105-B02:1999
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SIST EN ISO 105-B02:1999
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SIST EN ISO 105-B02:1999
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SIST EN ISO 105-B02:1999
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SIST EN ISO 105-B02:1999
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SIST EN ISO 105-B02:1999
INTERNATIONAL
IS0
STANDARD 105B02
Fourth edition
1994-09-I 5
Textiles - Tests for colour fastness -
Part B02:
Colour fastness to artificial light: Xenon arc
fading lamp test
- Essais de solidit des teintures -
Textiles
Par-tie 602: Solidit des teintures 9 la /urn&e artificielle: Lampe & arc au
x&on
Reference number
IS0 105-B02:1994(E)
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SIST EN ISO 105-B02:1999
IS0 105-B02:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 105-B02 was prepared by Technical Committee
ISOFC 38, Textiles, Subcommittee SC 1, Tests for coloured textiles and
colorants.
This fourth edition cancels and replaces the third edition
(IS0 105-B02:1988), of which it constitutes a technical revision.
IS0 105 was previously published in 13 “parts”, each designated by a
letter (e.g. “Part A”), with publication dates between 1978 and 1985. Each
part contained a series of “sections”, each designated by the respective
part letter and by a two-digit serial number (e.g. “Section A01 “). These
sections are now being republished as separate documents, themselves
designated “parts” but retaining their earlier alphanumeric designations.
A complete list of these parts is given in IS0 105-AOI .
Annexes A and B form an integral part of this part of IS0 105. Annex C is
for information only.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
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SIST EN ISO 105-B02:1999
~~~~
INTERNATIONAL STANDARD 0 IS0 IS0 105-B02:1994(E)
Textiles - Tests for colour fastness -
Part BOZ:
Colour fastness to artificial light: Xenon arc fading lamp test
ness - Part A02: Grey scale for assessing change in
1 Scope
co/our.
This part of IS0 105 specifies a method intended for
IS0 105-AO5:4 Textiles - Tests for colour fastness
determining the resistance of the colour of textiles of
- Part A05: Method for the instrumental assessment
all kinds and in all forms to the action of an artificial
of the change in colour of a test specimen.
light source representative of natural daylight (Des).
The method is also applicable to white (bleached or
I SO 1050BO 1 :-*I, Textiles - Tests for colour fastness
optically brightened) textiles.
- Part 801: Co/our fastness to light: Daylight.
This method allows the use of two different sets of
IS0 105-B05:1993, Textiles - Tests for co/our fast-
blue wool references. The results from the two dif-
ness - Part B05: Detection and assessment of
ferent sets of references may not be identical.
photochromism.
NOTE 1 General information on colour fastness to light
IS0 3696: 1987, Water for analytical laboratory use -
is given in annex C.
Specification and test methods.
CIE Publication No. 51, Method for assessing the
quality of daylight simulators for calorimetry.
2 Normative references
The following standards contain provisions which,
through reference in this text, constitute provisions
of this part of IS0 105. At the time of publication, the
editions indicated were valid. All standards are subject 3 Principle
to revision, and parties to agreements based on this
A specimen of the textile to be tested is exposed to
part of IS0 105 are encouraged to investigate the
artificial light under prescribed conditions, along with
possibility of applying the most recent editions of the
a set of blue wool references. The colour fastness is
standards indicated below. Members of IEC and IS0
maintain registers of currently valid International assessed by comparing the change in colour of the
Standards. test specimen with that of the references used.
For white (bleached or optically brightened) textiles,
IS0 105-AOl : 1994, Textiles - Tests for co/our fast-
the colour fastness is assessed by comparing the
ness -
Part AOl: General principles of testing.
change in whiteness of the specimens with that of
IS0 %05-AO2:1993, Textiles - Tests for co/our fast- the reference used.
1) To be published.
2) To be published. (Revision of IS0 105-B01:1989)
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SIST EN ISO 105-B02:1999
0 IS0
IS0 105-B02:1994(E)
proportions of wool dyed with Cl Mordant Blue 1
4 Reference materials and apparatus
(Colour Index, third edition, 43830) and wool dyed
with Cl Solubilized Vat Blue 8 (Colour Index, third
4.1 Reference materials
edition, 73801) so that each higher-numbered refer-
ence is approximately twice as fast as the preceding
Either of two sets of blue wool references may be
reference.
used. The results from the two sets of references are
not interchangeable.
4.1.3 Humidity test control
The colour fastness ratings mentioned in this part of
Effective humidity is defined as the combination of air
IS0 105 are obtained by comparison with either blue
and surface temperatures and air relative humidity
wool references 1 to 8 (preferable in Europe) or blue
which governs the moisture content of the surface
wool references L2 to L9 (preferable in America).
of the test specimen during exposure. The effective
humidity can be measured only by determining the
4.1.1 References 1 to 8
colour fastness of a specific humidity test control.
Blue wool references developed and produced in
For the purposes of this part of IS0 105, the humidity
Europe are identified by the numerical designation 1
test control is a red azoic dyed cotton cloth.
to 8. These references are blue wool cloths dyed with
the dyes listed in table 1. They range from 1 (very low
This control has been calibrated by exposing it facing
colour fastness) to 8 (very high fastness) so that each
south in several Western European locations at dif-
higher-numbered reference is approximately twice as
ferent times of the year, the exposures being made
fast as the preceding one.
together with the references in sealed vessels con-
taining air maintained at constant humidities between
4.1.2 References L2 to L9
0 and 100 %; the results did not vary greatly and the
mean values are shown in figure 1.
Blue wool references developed and produced in the
When this control was exposed under the conditions
United States are identified by the letter L followed
specified in IS0 105-BOl in temperate zones, its
by the numerical designation 2 to 9. These eight ref-
erences are specially prepared by blending varying colour fastness was found to be, on average, 5.
Table 1 - Dyes for blue wool references 1 to 8
Reference Dye (Colour Index designation) 1)
Cl Acid Blue 104
Cl Acid Blue 109
Cl Acid Blue 83
Cl Acid Blue 121
Cl Acid Blue 47
Cl Acid Blue 23
Cl Solubilized Vat Blue 5
8 Cl Solubilized Vat Blue 8
1) The Colour Index (third edition) is published by the Society of Dyers and
Colourists, P.O. Box 244, Perkin House, 82 Grattan Road, Bradford BDI ZJB,
West Yorks, UK, and by the American Association of Textile Chemists and
Colorists, P.O. Box 12215, Research Triangle Park, NC 27709-2215, USA.
.>
2
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SIST EN ISO 105-B02:1999
IS0 1059B02:1994(E)
7
6-7 ’
6
!!
x
cc 5
E
cn
.-
NJ
4
3
2 ’
20 30 40 50 60 70 80 90 100
0 10
Effective humidity, %
Mean values obtained from humidity test control exposures
Figure 1 -
a) Light source, in a well-ventilated exposure
4.2 Apparatus
chamber.
The light source shall consist of a xenon arc lamp
of correlated colour temperature 5 500 K to
4.2.1 Xenon arc lamp apparatus, either air-cooled
6 500 K, the size of which will depend on the type
or water-cooled.
of apparatus used.
The specimens and the references are exposed in one
b) Light filter, placed between the light source and
of the two types of apparatus (see 4.2.1 .l and
the specimens and references so that the ultra-
4.2.1.2). The variation in light intensity over the area
violet spectrum is steadily reduced.
covered by the specimens and references shall not
exceed + 10 % of the mean. The recommended level
The transmission of the filter system used shall
of irradiance (radiant power per unit area) measured
be at least 90 % between 380 nm and 750 nm,
by a radiometer (4.2.6) is 42 W/m’ x wavelength, in
falling to 0 between 310 nm and 320 nm.
nanometres, at 300 nm to 400 nm, equivalent in
cases of water-cooled xenon arc apparatus to c) Heat filter, placed between the light source and
1,l W/m* x wavelength, in nanometres, at 420 nm. the specimens and references so that the amount
of infrared (IR) radiation contained in the xenon arc
The distances from the surface of the specimen and
spectrum is steadily reduced (see A.1 .l and
from the surfaces of the references to the lamp shall
A.2.2).
be the same.
If a glass or water filter is used to eliminate ex-
cess infrared radiation so as to meet the tem-
perature conditions specified in 4.2, frequent
4.2.1.1 Air-cooled xenon arc lamp apparatus (see
cleaning shall be carried out to avoid unwanted
annex A), consisting of the following elements:
filtering caused by dirt (see B.l.4).
NOTE 2 For exposure conditions preferable for use in
Europe, see 6.1.
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SIST EN ISO 105-B02:1999
0 IS0
IS0 105-B02:1994(E)
4.2.1.2 Water-cooled xenon arc lamp apparatus the spectrum of light reaching the specimen; the side
of the panel not facing the light source shall be
(see annex B), consisting of the following elements:
thermally insulated (see also B.l.5).
a) Light source, in a well-ventilated exposure
chamber.
4.2.3.2 The black-standard thermometer (BST) shall
consist of a plane of stainless steel plate measuring
The light source shall consist of a xenon arc lamp
about 70 mm x 30 mm and with a thickness of about
of correlated colour temperature 5 500 K to
0,5 mm, whose temperature is measured by a ther-
6 500 K, the size of which will depend on the type
mal resistor, with good heat-conducting properties,
of apparatus used.
fitted to the reverse side. The metal plate is fixed to
a plastics plate so that it is thermally insulated. It is
b) Light filter, consisting of inner and outer filter
coated with a black layer which has an absorption of
glass containing and directing the flow of cooling
at least 95 %, even in the infrared range.
water, placed between the light source and the
specimens and references so that the ultraviolet
4.2.4 Grey scale for assessing change in colour,
spectrum and a part of the infrared spectrum are
complying with IS0 105-A02.
steadily reduced.
4.2.5 Colour-matching lamp, in accordance with
For exposure conditions preferable for use in Eur-
CIE Publication No. 51, for assessing change in
ope [see 6.1 a) and 6.1 b)]: inner and outer IR filter
whiteness.
glass and a lantern, equipped with European win-
dow glass. The transmission of the filter system
used shall be at least 90 % between 380 nm and 4.2.6 Radiometer, (when available/specified) for
750 nm, falling to 0 between 310 nm and measuring irradiance and radiant exposure in the
320 nm. wavelength range 300 nm to 400 nm or at a specific
wavelength (e.g. 420 nm) (see A.l.7 and B.1.8).
For exposure conditions preferable for use in
Since irradiance at the test specimen face can vary
America (see 6.2): an inner filter of Pyrex
(borosilicate) glass and an outer filter of clear as a function of lamp intensity and lamp-to-specimen
distance, a monitoring radiometer may be used to
(soda lime) glass are used so that the irradiation
control uniformity of exposure. The radiometer per-
at the specimen has a lower spectral cut-off ap-
mits exposure to an established level of irradiance
proximately equal to that of window glass (see
(radiant energy flux per unit area) at a point in the
B.l.2).
plane of the specimen rack.
c) Heat filter, comprising grade 3 water (see
IS0 3696) circulating through the lamp assembly
5 Test specimens
between the inner and outer filter glass, cooled
by passing through a heat-exchange unit (see
The size of the test specimen will depend on the
B.1.4).
number of specimens to be tested and on the shape
and dimensions of the specimen holders supplied
with the apparatus.
4.2.2 Opaque cardboard or other thin opaque ma-
terial, for example thin sheet aluminium or cardboard
covered with aluminium foil, for partial covering of
5.1 In apparatus of the air-cooled type (4.2.1.1), an
samples and references.
area of the textile not less than 45 mm x 10 mm is
usually used when several periods of exposure are
made side by side on the same specimen, which is
4.2.3 Temperature sensor, either a black-panel
the preferred practice. The specimen may be a strip
thermometer (BPT) or black-standard thermometer
of cloth, yarn wound close together on a card or laid
(BST).
parallel and fastened on a card, or a mat of fibres
combed and compressed to give a uniform surface
4.2.3.1 The black-panel thermometer (BPT) shall
and fastened on a card. Each exposed and unexposed
consist of a metal panel at least 45 mm x 100 mm
area shall be not less than 10 mm x 8 mm.
whose temperature is measured with a thermometer
or a thermocouple whose sensitive portion is located
5.2 To facilitate handling, the specimen or speci-
in the centre of and in good contact with the panel.
mens to be tested and similar strips of the references
The side of the panel facing the light source shall be may be mounted on one or more cards as indicated
black with a reflectance of less than 5 % throughout in figure 2 or 3.
4
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SIST EN ISO 105-B02:1999
0 IS0 IS0 105-B02:1994(E)
2) high effective humidity:
5.3 In apparatus of the water-cooled type, specimen
holders are fitted to take specimens of approximately
- colour fastness of the humidity test con-
70 mm x 120 mm. When desired, specimens of dif-
trol: 3;
ferent sizes to fit alternative sizes of specimen holder
may be used. References shall be exposed on a white
- maximum black-standard temperature
cardboard backing. Specimens may also be mounted
45 “C.
on white cardboard if desired.
NOTE 3 Measurements with the black-panel
thermometer (BPT) (4.2.3.1) yield a temperature 5 “C lower
The covers (4.2.2) shall make close contact with
5.4
than the more modern black-standard thermometer (BST)
the surface of the unexposed areas of the specimens
(4.2.3.2).
and the references, in order to give a sharp line of
demarcation between exposed and unexposed areas,
6.2 Conditions preferable for use in America
but shall not compress the specimen unnecessarily.
Black-panel temperature (63 + 1) “C (see 4.2.3.1); the
5.5 The specimens to be tested and the blue wool
controls of the apparatus a; adjusted so that the
references shall be of equal size and shape in order
relative humidity of the air in the test chamber is
to avoid errors in assessment due to overrating the
(30 + 5) %. Effective humidity: low. Colour fastness
visual contrast between exposed and unexposed
of the humidity test control: 6-7.
parts on a larger pattern as against a narrower refef-
ence (see 8.4).
These conditions shall be controlled by continuous
operation of a blower, with concomitant measuring
and thermostatic control of the temperature of a con-
5.6 When testing pile fabrics, the references shall
stant volume of air whose relative humidity is in-
be arranged so that they are the same distance from
creased by adding moisture to the air as it passes
the light source as the surface of the pile fabrics. This
through the conditioning chamber by means of an
can be achieved for example by using pieces of card-
electrically operated atomizer.
board as underlay. Covers for the unexposed portions
shall avoid surface compression.
7 Procedure
Pile fabrics, such as carpets, which have fibres that
may shift position or texture which may make evalu-
7.1 Adjustment of the humidity (see
ation of small areas difficult, shall be tested with an
clause 6)
exposed area not less than 50 mm x 40 mm and
preferably larger.
7.1.1 Check that the apparatus is in good running
order and that it is equipped with a clean xenon
burner tube. (Follow the manufacturer’s directions
6 Exposure conditions
and see annexes A and B.)
61 . Conditions preferable for use in Europe
7.1.2 Place a portion of the humidity test control
(4.1.3) measuring not less than 45 mm x 10 mm, to-
Normal conditions (temperate zone): moderate
a)
gether with the blue wool references (4.1 .l or 4.1.21,
effective humidity (see 4.1.3); colour fastness of
on a card, if possible in the middle area of the speci-
the humidity test control: 5; maximum black-
men holder (see 5.3).
standard temperature: 50 “C (see 4.2.3.2).
7.1.3 Place the filled specimen holders on the
Extreme conditions: For testing the sensitivity
b)
specimen rack of the apparatus, with the holders
of specimens to different humidity during
supported both top and bottom and in proper vertical
irradiation, the following extreme conditions are
alignment. Completely fill all remaining spaces in the
useful:
specimen rack with holders containing white card-
board.
1) low effective humidity:
7.1.4 Operate the apparatus with the light on con-
- colour fastness of the humidity test con-
tinuously until a test is completed unless the lamp
trol: 6-7;
requires cleaning or the burner, outer filter or inner
- maximum black-standard temperature: filter requires changing because it has reached the
65 “C; maximum number of hours of recommended usage.
5
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SIST EN ISO 105-B02:1999
IS0 105-B02:1994( E)
7.1.5 Expose the partially covered strip of the hu-
C A
midity test control and the references simultaneously
-w-
l--l -1
until a contrast between the exposed and unexposed
r
x --i
portions equal to grade 4 on the grey scale is pro-
I
Specimen
I
duced on the humidity test control.
I
under test
I
d
I
I
I
I Reference 1 or L2
7.1.6 Assess the colour fastness of the humidity I
I
test control at this stage and, if necessary, adjust the
Reference 2 or L3
I
I
controls on the apparatus to give the selected ex-
I
I Reference 3 or L4
posure conditions. Check daily and when necessary
I
readjust the controls to maintain the specified black- I
I Reference 4 or L5
panel (black-standard) temperature and humidity.
I
I
I
Reference 5 or L6
I
I
Reference 6 or L7
I
I
I
I
7.2 Exposure methods
Reference 7 or L8
I
I
Reference 8 or L9
I
Expose the specimen (or group of specimens) and the
I
references simultaneously, under the desired con-
I
I
ditions, in such a manner and for such a time as is
necessary to evaluate fully the colour fastness of each
specimen relative to that of the references, by pro-
gressively covering both the specimens and the ex-
AB: Opaque cover; may be hinged at X-X so that it can
posed references during the test (using either method
be lifted and returned to the same place over the
1 or method 2). Covering arrangements other than
specimen and references
those described, for instance covering specimens and
references on both ends and exposing the middle
CD: Second cover
third or half, are also allowed.
Figure 2 - Mounting of specimen and references
for exposure method 1
7.2.1 Method 1
If there is a possibility of the sample being
This method is considered most exact and should be
photochromic, then at this stage the test for
used in cases of dispute over the numerical rating.
photochromism shall be applied additionally (see
The basic feature is the control of the exposure period
IS0 1 OS-BOS).
by inspection of the specimen, and therefore only one
set of blue wool references is required for each
For all specimens except for white (bleached or op-
specimen under test.
tically brightened) specimens, continue the procedure
as described in 7.2.1.2 to 7.2.1.4. For optically bright-
ened textiles, continue with the procedure as de-
7.2.1.1 Arrange the test specimen and the refer-
scribed in 7.2.1.5.
ences as shown in figure2 with an opaque cover AB
across the middle one-third of the specimen and ref-
erences. Expose to the xenon arc light under the
7.2.1.2 Continue to expose until the contrast be-
conditions enumerated in 7.1. Follow the effect of
tween the exposed and the unexposed portions of the
light by removing the cover and inspecting the speci-
specimen is equal to grey scale grade 4. Cover the
men frequently. When a change in the test specimen
left-hand one-third of the specimen and references
can be perceived equal to grey scale 4-5, note the with an additional opaque cover (CD in figure 2).
ntimber of the blue wool reference showing a similar
change. (This is a preliminary assessment of colour
7.2.1.3 Continue to expose until the contrast be-
firstness.)
tween the fully exposed and unexposed portions of
the test specimen is equal to grey scale grade 3.
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SIST EN ISO 105-B02:1999
0 IS0 IS0 1059B02:1994(E)
cover, CD, in the position shown in figure3),
7.2.1.4 If reference 7 or L7 fades to a contrast equal
overlapping the first cover, AB.
to grey scale grade 4 before the test specimen does,
the exposure is terminated at this stage. When a
specimen has a colour fastness equal to or greater 7.2.2.4 Continue to expose the specimens until a
than 7 or L7, it would require unduly long exposure to change in reference 6 or L5 can be perceived equal
produce a contrast equal to grey scale grade 3; to grey scale 4-5, then fix the final cover, EF, in the
position shown in figure3, the other two covers re-
moreover, this contrast would be impossible to obtain
maining in position.
when the colour fastness is 8 or L9. Assessments in
the region of 7-8 or L7-L8 are made, therefore, when
the contrast produced on reference 7 or L7 is equal 7.2.2.5 Expose until either
to grey scale 4, the time required to produce this
a) a contrast is produced on reference 7 or L7 equal
contrast being long enough to eliminate any error
to the contrast illustrated by grey scale grade 4;
which might result from inadequate exposure.
or
7.2.1.5 For white (bleached or optically brightened)
b) a contrast equal to grey scale grade 3 has been
textiles, continue to expose until the contrast be-
produced on the most resistant specimen; or
tween the exposed and unexposed portions of the
specimen is equal to grey scale grade 4.
c) for white (bleached or optically brightened) tex-
tiles, a contrast equal to grey scale grade 4 has
7.2.2 Method 2
been produced on the most resistant specimen;
whichever occurs first.
7.2.2.1 This method should be used when a large
number of specimens have to be tested simul-
NOTE 4 The contrast referred to in a) and b) may occur
taneously. The basic feature is the control of the ex-
before the fading defined in 722.3 or 7.2.2.4 has taken
posure periods by inspection of the references, which
place.
allows a number of specimens differing in colour
fastness to be tested against a single set of refer-
7.2.3 Method 3
ences, thus conserving supplies.
Where the test is to be used to check conformity with
7.2.2.2 Arrange the test specimens and the refer-
a performance specification, it is permissible to ex-
ences as shown in figure3 with the cover AB covering
pose the specimens with two blue wool references
one-quarter of the total length of each specimen and
only: that specified as minimum and the one below it.
reference. Expose under the conditions enumerated
Continue exposure until grey scale grade 4 and grey
in 7.1.1 and 7.1.2. Follow the effect of light by lifting
scale grade 3 contrasts have been produced on sep-
the cover AB periodically and inspecting the refer-
arate areas of the minimum blue wool reference. For
ences. When a change in reference 3 or L2 can be
white (bleached or optically brightened) textiles, con-
perceived equal to grey scale grade 4-5, inspect the
tinue exposure until a grey scale grade 4 contrast has
specimens and rate their colour fastness by compar-
been produced between separate areas of the mini-
ing any change that has occurred with the changes
mum blue wool reference.
that have occurred in references 1, 2 and 3 or L2.
(This is a preliminary assessment of colour fastness.)
7.2.4 Method 4
If there is a possibility of the sample being
Where the test is to be used to check conformity with
photochromic,
then at this stage the test for
an agreed-upon reference sample, it is permissible to
photochromism shall be applied additionally (see
expose the specimens with the reference sample
IS0 105-805).
only. Continue exposure until grey scale grade 4
and/or grey scale grade 3 contrasts have been pro-
duced on the reference sample. For white (bleached
7.2.2.3 Replace the cover AB in exactly the same
position and continue to expose the specimens until or optically brightened) textiles, continue exposure
a change in reference 4 or L3 can be perceived equal until a grey scale grade 4 contrast has been produced
to grey scale grade 4-5; at this point fix an additional on the reference sample.
7
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SIST EN ISO 105-B02:1999
IS0 1059B02: 1994( E) Q IS0
I
1
1st 2nd 3rd f
Un-
exposed period period period
, .
E
---
X
r
1
C
Specimens
under test
Reference 1 or L2
Reference 2
or L3
Reference 3 or L4
Reference 4 or L5
Reference 5 or L6
Reference 6 or L7
Reference 7 or L8
Reference 8 or L9
AB: Opaque cover; may be hinged at X-X so that it can be lifted and returned to the same place over the specimen
and references
CD: Second cover
EF: Third cover
Figure 3 - Mounting of specimens and references for exposure method 2
7.2.5 Method 5
ratings is based on a contrast equal to grey scale
grade 4 between exposed and unexposed portions of
Where the test is to be used to check conformity to
the specimen.
agreed-upon radiant energy levels, it is permissible to
expose the specimens alone or with blue wool refer-
8.2 Remove all the covers, thus revealing on test
ences. The specimens should be exposed until the
specimens and references two or three areas, de-
specified amount of radiant energy is reached then
pending on the method used, which have been ex-
removed, together with the blue wool references, and
posed for different times, together with at least one
evaluated in accordance with 8.9.
area which has not been exposed to light. Compare
the changes in the specimen with the relevant
changes in the references under suitable illumination
8 Assessment of colour fastness
(see IS0 105-A01 :1994, clause 14).
The final assessment given as numerical For white (bleached or optically brightened) textiles,
ratings, is based on contrasts equal to grey scale the use of artificial daylight produced by a colour-
grade 3 between exposed and unexposed portions of matching lamp (4.2.5) is recommended and is
,b:he test specimen. For white (bleached or optically necessary in cases of dispute, unless otherwise
briyhtened) textiles, the final assessment in numerical
agreed.
h
a
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