Single scale, 3-field petroleum comparator designed for visual color grading by direct comparison between the sample and colored glass filters housed in test discs conforming to the chromaticity coordinates of ASTM D1500.

Manufacturer: Koehler
Model: K13290

The sample and two consecutive glasses on the color scale are viewed simultaneously, making it easier to achieve the optimum color match. The tungsten halogen light source is color corrected to CIE Standard Illuminant C.
 

Features:

• Conforms to ASTM D1500 specifications

• Applies to products with an ASTM color of 0.5 or darker