ISO 4630:2015 PDF

Scope: This International Standard 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.

ISO 4630:2015 Referenced Document

ASTM D1544-04 Standard Test Method for Color of Transparent Liquids (Gardner Color Scale)*， 2024-04-20 Update
ASTM D6166-12 Standard Test Method for Color of Pine Chemicals and Related Products (Instrumental Determination of Gardner Color)*， 2024-04-20 Update
CIE 15-2004 Colorimetry (Third Edition; ***For (SDO) Subscription Customers Only ***)
ISO 13632:2012 Binders for paints and varnishes - Rosin - Sampling and sample preparation for colour measurement
ISO 15528:2013 Paints, varnishes and raw materials for paints and varnishes.Sampling
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 6271:2015 Clear liquids - Estimation of colour by the platinum-cobalt colour scale

2015 ISO 4630:2015 Clear liquids - Estimation of colour by the Gardner colour scale
1997 ISO 4630:1997 Binders for paints and varnishes - Estimation of colour of clear liquids by the Gardner colour scale
1981 ISO 4630:1981 Binders for paints and varnishes — Estimation of colour of clear liquids by the Gardner colour scale