Gardner (ASTM D1544, D6166) Colour Reference Standards are for routine calibration of colour measuring instruments and verification of test data. These colour standards are dual UKAS certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.

These standards are especially designed for use in DIN, Ford, ISO, Shell and Zahn flow cups. Certified at 20°C and 25°C, each value is tested to ASTM D2162 for viscosity measurement and ASTM D1480 for Density measurement, certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.

These standards ensure full compliance to ASTM & IP test method protocol and are fully traceable to national standards. They are dual UKAS certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.