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Paint and Coatings Committee Seeks Users of Color Specifications

A task group of color specialists in ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications invites users of color specifications to develop a “Standard Guide Protocol for How a Supplier and Customer Set a Color Specification for a Material.”

Interested parties should contact task group chairman Ellen C. Carter, Ph.D., consultant, Minolta Corporation, Ramsey, N.J. Carter says the proposed guide will assist technicians in establishing numerical (instrumental) tolerances for color and provide standards of ideal color for raw material suppliers, coatings producers, pigment, or coatings manufacturers setting color specifications.

“Color is an important parameter in the acceptance criteria for materials,” says Carter. “Rejected shipments (due to color issues) result in lost time and money.”

Using the guide will assure that color standards in a control program are of the exact color within a very small tolerance, directing users to:

• Establish a program to monitor the color quality of the working standards;
• Establish tolerances with a wide range of samples that have been visually evaluated as acceptable or unacceptable when compared to the standard;
• Measure the samples instrumentally and plot the results in lab space;
• Produce an acceptability ellipse that encompasses the acceptable samples.

Paint and coating makers reference hundreds of color specifications, Carter says, therefore industry representatives at ASTM meetings called for the development of the guide to set uniform color tolerances. With procedures developed primarily by Committees D01 and E12 on Color and Appearance, the guide will be a “how-to” roadmap for the approximately 12 existing ASTM standards for color specifications, Carter says, directing which to use first, etc. “Otherwise, each person has to rediscover that whole process,” she notes.

The task group welcomes interested parties to discuss the first draft at their Jan.13 meeting in Ft. Lauderdale. For further technical information, contact Ellen Carter, Ph.D. (phone: 973/237-0643). Committee D01 meets Jan. 11-14 in Ft. Lauderdale. For meeting or membership details, contact Tim Brooke, director, Technical Committee Operations, ASTM International (phone: 610/832-9729). //

Copyright 2003, ASTM