The colour reference solution can be used in visual comparison or as part of a calibration of colorimeters and spectrophotometer for colour comparison. The solution can be used to prepare reference solution with different Hazen values.

• Traceable to NIST SRM930e
• Shelf life of unopened bottle is minimum of 18 months

For use under DIN EN ISO 7887, ASTM D 1209-05, DIN EN ISO 6271-1, APHA 2120 B & C