BYK Gardner 6810 Black Standard Comparator, Color-Guide

Liquid Color Standards range from water white through yellow to deep amber. Liquid Standards 1 through 8 are solutions of potassium (No Suggestions). They are light in value, have a very slight greenish hue and are most often used in testing unheated liquids. Standards 9 through 18 are solutions of ferric chloride and cobalt chloride; they are darker and are generally used to test varnishes, oil and resins which have reached color through heating.