scope:

This International Standard specifies a method for estimating, by means of the Gardner colour scale, the colour of clear, yellow/brown, liquid products using colour measuring instruments. The results may be invalid if other products are used. 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. It is applicable to pro ducts having colours from Gardner 1 to Gardner 18. The Gardner scale is not applicable to products with colours lighter than 1 or darker than 18.