ISO-2049
Color of Petroleum Products (ASTM Color Scale)

Color is often used as a control on product quality.  This method determines color by visual comparison to glass standards ranging in value from 0.5 to 8.0.  When an exact match is not found, the higher number is reported.  Saybolt Color by ASTM  D-156 is appropriate for oils lighter than ASTM Color 0.5.

Also see:    D-1500

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