DIN EN ISO 4630-2:2005-03

The standard specifies a method for the classification of colour of clear, yellow/brown, liquid product using colour measuring instruments. The results may be invalid if other products are used. The test uses the Gardner colour scale described in ISO 4630-1. The method is applicable to naval stores material including tall oil, tall oil fatty acids, rosin, and related products. It is also applicable to drying oils, varnishes and solutions of fatty acids, polymerized fatty acids and resins. Its applicability to other materials has not been established.