EN ISO 4630:2015

Clear liquids - Estimation of colour by the Gardner colour scale (ISO 4630:2015)

ISO 4630:2015 specifies a method for estimating the colour of optically clear, yellow/brownish coloured liquid products by means of the Gardner colour scale using colour-measuring instruments. The method uses the Gardner colour scale described in Annex A.
It is applicable to drying oils, varnishes and solutions of fatty acids, polymerized fatty acids, resins, tall oil, tall oil fatty acids, rosin and related products. The results might be invalid if other products are tested.
The method described provides a more precise way of measuring Gardner colour than a visual sample comparison using human eyes. It is applicable to products having colours from Gardner 1 to Gardner 18. The Gardner scale is not applicable to products with colours darker than 18. For products with colours lighter than Gardner 1 the method specified in ISO 6271 applies.

Klare Flüssigkeiten - Bestimmung der Farbe nach der Gardner-Farbskala (ISO 4630:2015)

Diese Internationale Norm legt ein Verfahren zum Beurteilen der Farbe von optisch klaren, gelbbraunen, flüssigen Produkten mit der Gardner-Farbskala unter Verwendung von Farbmessgeräten fest. Das Ver-fahren wendet die im Anhang A beschriebene Gardner-Farbskala an.
Es ist für trocknende Öle, Klarlacke und Lösungen von Fettsäuren, polymerisierten Fettsäuren, Harzen, Tallöl, Tallöl-Fettsäuren, Kolophonium und ähnliche Produkte anwendbar. Für andere Produkte können die Er¬geb¬nisse falsch sein.
Das beschriebene Verfahren erlaubt es, die Gardner-Farbzahl genauer zu messen als der visuelle Vergleich von Proben mit dem menschlichen Auge. Es ist anwendbar auf Produkte, deren Farbe den Gardner-Farb-zahlen 1 bis 18 entspricht. Die Gardner-Farbskala ist nicht anwendbar auf Produkte, die dunkler als Gard-ner-Farb¬zahl 18 sind. Für Produkte mit einer helleren Farbe als Gardner-Farbzahl 1 gilt die Methode nach ISO 6271.

Liquides clairs - Évaluation de la couleur au moyen de l'échelle de couleur Gardner (ISO 4630:2015)

ISO 4630:2015 spécifie une méthode d'évaluation, au moyen de l'échelle de couleur Gardner, de la couleur de produits liquides optiquement clairs et jaune-brun à l'aide d'instruments de mesure de la couleur. La méthode implique l'utilisation de l'échelle de couleur Gardner décrite dans l'Annexe A.
Elle est applicable aux huiles siccatives, aux vernis et aux solutions d'acides gras, d'acides gras polymérisés, aux résines, au tallol, aux acides gras de tallol, à la colophane et aux produits apparentés. Les résultats peuvent ne pas être valables si d'autres produits sont soumis à l'essai.
La méthode décrite ci-après permet de mesurer les couleurs au moyen de l'échelle de couleur Gardner de façon plus précise que la méthode par comparaison visuelle des échantillons à l'?il nu. Elle est applicable aux produits dont la couleur est comprise entre l'indice de couleur Gardner 1 et l'indice de couleur Gardner 18. L'échelle Gardner n'est pas applicable aux produits dont la couleur est plus foncée que l'indice 18. Pour les produits dont la couleur est plus claire que l'indice de couleur Gardner 1, la méthode spécifiée dans l'ISO 6271 s'applique.

Prozorne tekočine - Ocenjevanje barve z Gardnerjevo barvno lestvico (ISO 4630:2015)

Ta mednarodni standard določa metode za ocenjevanje barve optično čistih tekočih izdelkov rumeno-rjave barve z Gardnerjevo barvno lestvico in s pomočjo instrumentov za merjenje
barve. Metoda uporablja Gardnerjevo barvno lestvico, ki je opisana v dodatku A.
Uporablja se za sušeča se olja, lake in spojine maščobnih kislin, polimerizirane maščobne kisline, smole, talovo olje, maščobne kisline talovega olja ter z njimi povezane izdelke. Pri preskusu drugih izdelkov so lahko pridobljeni rezultati neveljavni.
Za merjenje Gardnerjevih barv je opisana metoda natančnejša od vizualne primerjave vzorcev s človeškimi očmi. Uporablja se za izdelke barv, ki na Gardnerjevi lestvici ustrezajo barvam v razponu med 1 in 18. Gardnerjeva lestvica se ne uporablja za izdelke temnejših barv od vrednosti 18. Za izdelke svetlejših barv od vrednosti 1 Gardnerjeve lestvice se uporablja metoda, določena v standardu ISO 6271.

General Information

• Status: Published
• Publication Date: 22-Dec-2015
• Withdrawal Date: 29-Jun-2016
• ICS: 17.180.20 - Colours and measurement of light
• ICS: 87.060.20 - Binders
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 23-Dec-2015
• Completion Date: 23-Dec-2015
• Ref Project: SIST EN ISO 4630:2016 - Clear liquids - Estimation of colour by the Gardner colour scale (ISO 4630:2015)

Relations

• Replaces: EN ISO 4630-2:2004 - Clear liquids - Estimation of colour by the Gardner colour scale - Part 2: Spectrophotometric method (ISO 4630-2:2004)
• Effective Date: 08-Jun-2022
• Replaces: EN ISO 4630-1:2004 - Clear liquids - Estimation of colour by the Gardner colour scale - Part 1: Visual method (ISO 4630-1:2004)
• Effective Date: 22-Jan-2014

Overview

EN ISO 4630:2015 - Clear liquids: Estimation of colour by the Gardner colour scale (ISO 4630:2015) defines an instrumental method to estimate the colour of optically clear, yellow/brownish liquids using the Gardner colour scale. Issued by CEN/ISO, this consolidated third edition replaces earlier visual-comparison procedures and standardizes a spectrophotometric approach for more precise, reproducible colour measurement of products such as drying oils, varnishes, resins, tall oil and rosin solutions.

Key Topics

• Scope: Applicable to optically clear, yellow/brown liquids with colours from Gardner 1 to Gardner 18. Not suitable for darker (>18) or extremely light (<1; see ISO 6271).
• Method: Instrumental measurement of transmitted colour (recommended 0°/180° geometry spectrophotometer). Instruments reporting Gardner units or tristimulus values (convertible using CIE Publication No. 15:2004, standard illuminant C, 2° observer) are acceptable.
• Apparatus: Spectrophotometer, 10 mm absorption cells (recommended) or instrument-specific glass tubes (e.g., 11 mm).
• Sample preparation: Representative sampling per ISO 15528 / ISO 13632; remove haze by filtration, centrifugation or other means when necessary. Avoid air bubbles and follow instrument baseline calibration.
• Reporting: Colour reported to the nearest 0.1 Gardner unit.
• Precision: Repeatability limit r = 0.1 Gardner units (s_r = 0.02); reproducibility limit R = 0.5 Gardner units (s_R = 0.18). Bias is not established due to lack of a suitable reference material.
• Annex A: Normative description of the Gardner colour standards and reagents for their preparation.

Applications

• Quality control and acceptance testing for drying oils, varnishes, tall oil derivatives, rosin and related products.
• Routine production monitoring, supplier verification, and batch-to-batch colour consistency checks.
• R&D and formulation labs requiring objective, traceable measurement of yellow/brown tint in clear liquids.
• Calibration and validation of colour-measuring instruments used in the coatings, adhesives, and naval stores sectors.

Who should use this standard

• Laboratory technicians and managers performing colour measurement.
• Paint, varnish and resin manufacturers.
• Suppliers of tall oil, rosin, fatty-acid solutions and related naval-store products.
• Quality assurance and compliance professionals specifying product colour limits.

Related Standards

• ISO 6271 (for colours lighter than Gardner 1)
• ISO 3696 (water for laboratory use)
• ISO 5725-2 (precision of measurement methods)
• ISO 13632, ISO 15528 (sampling)
• CIE Publication No. 15:2004 (Colorimetry)

Keywords: EN ISO 4630:2015, Gardner colour scale, colour measurement, clear liquids, spectrophotometer, drying oils, varnishes, rosin, tall oil, instrumental Gardner color determination.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2016
1DGRPHãþD
SIST EN ISO 4630-1:2005
SIST EN ISO 4630-2:2005
3UR]RUQHWHNRþLQH2FHQMHYDQMHEDUYH]*DUGQHUMHYREDUYQROHVWYLFR,62

Clear liquids - Estimation of colour by the Gardner colour scale (ISO 4630:2015)
Klare Flüssigkeiten - Bestimmung der Farbe nach der Gardner-Farbskala (ISO
4630:2015)
Liquides clairs - Évaluation de la couleur au moyen de l'échelle de couleur Gardner (ISO
4630:2015)
Ta slovenski standard je istoveten z: EN ISO 4630:2015
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
87.060.99 Druge sestavine barv Other paint ingredients
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4630
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2015
EUROPÄISCHE NORM
ICS 87.060.20 Supersedes EN ISO 4630-1:2004, EN ISO 4630-2:2004
English Version
Clear liquids - Estimation of colour by the Gardner colour
scale (ISO 4630:2015)
Liquides clairs - Évaluation de la couleur au moyen de Klare Flüssigkeiten - Bestimmung der Farbe nach der
l'échelle de couleur Gardner (ISO 4630:2015) Gardner-Farbskala (ISO 4630:2015)
This European Standard was approved by CEN on 1 November 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4630:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 4630:2015) has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
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 June 2016, and conflicting national standards shall be
withdrawn at the latest by June 2016.
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 ISO 4630-1:2004, EN ISO 4630-2:2004.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4630:2015 has been approved by CEN as EN ISO 4630:2015 without any modification.

INTERNATIONAL ISO
STANDARD 4630
Third edition
2015-12-01
Clear liquids — Estimation of colour
by the Gardner colour scale
Liquides clairs — Évaluation de la couleur au moyen de l’échelle de
couleur Gardner
Reference number
ISO 4630:2015(E)
©
ISO 2015
ISO 4630:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
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ii © ISO 2015 – All rights reserved

ISO 4630:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus and materials. 1
5 Sampling . 2
6 Procedure. 2
7 Expression of results . 2
8 Precision . 2
8.1 General . 2
8.2 Repeatability limit, r .2
8.3 Reproducibility limit, R .3
8.4 Bias . 3
9 Test report . 3
Annex A (normative) Gardner colour standards . 4
Bibliography . 6
ISO 4630:2015(E)
Foreword
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ISO 4630 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10,
Test methods for binders for paints and varnishes, in collaboration with ASTM D 01.34, Naval stores. It has
been harmonized with ASTM D 1544-04, Standard test Metho
...