Measures the colours of varnishes, drying oils, resins, nitro-cellulose, lacquers, fatty acids and similar transparent coloured liquids. Conforms to ASTM D-1544 and AOCS Method Td 1a. The prism displays the compared colours enlarged and side-by-side for accurate comparisons. Uses 18 non-fading, permanent glass colour standards in two discs with values of 1 to 9 and 9 to 18. System supplied complete with comparator 2000, Gardner discs (4/30 AS, 1-9; 4/30 BS, 10-18), and 2 x W680/OG/10mm fused cells.