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ASTM Standard helps determine enamel holdout.

Press Release Summary:

April 6, 2012 - Manufacturers and developers of architectural coatings will be primary users of ASTM D7786, Test Method for Determining Enamel Holdout. Standard was developed by Subcommittee D01.42 on Architectural Coatings, part of ASTM Committee D01 on Paint and Related Coatings, Materials and Applications. According to Keith Alderfer, associate scientist, The Dow Chemical Co., and member of D01.42, enamel holdout characteristic of primer can have significant impact on appearance of finished painted system.

ASTM International - West Conshohocken, PA

Original Press Release

Standard for Determining Enamel Holdout Developed by ASTM Paint Committee

Press release date: April 4, 2012

W. CONSHOHOCKEN, Pa., - Manufacturers and developers of architectural coatings will be the primary users of a new ASTM International standard, ASTM D7786, Test Method for Determining Enamel Holdout. The standard was developed by Subcommittee D01.42 on Architectural Coatings, part of ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications. Keith Alderfer, associate scientist, The Dow Chemical Co., and a member of D01.42, says that enamel holdout is an important attribute of an architectural primer. "The enamel holdout characteristic of a primer can have a significant impact on the appearance of the finished painted system, especially if that system is intended to have a semigloss or glossy finish," says Alderfer. "Semigloss topcoats over primers with poor enamel holdout characteristics or unprimed porous substrates can result in lower gloss than is intended from the final coating." While ASTM D7786 is now complete, Alderfer says that interested participants are invited to join in interlaboratory testing on the standard that is planned to begin this year. To purchase ASTM standards, visit www.astm.org and search by the standard designation, or contact ASTM Customer Relations (phone: 877-909-ASTM; sales@astm.org). ASTM International welcomes participation in the development of its standards. For more information on becoming an ASTM member, visit www.astm.org/JOIN. ASTM International is one of the largest international standards development and delivery systems in the world. ASTM International meets the World Trade Organization (WTO) principles for the development of international standards: coherence, consensus, development dimension, effectiveness, impartiality, openness, relevance and transparency. ASTM standards are accepted and used in research and development, product testing, quality systems and commercial transactions. For more news in this sector, visit astm.org/sn-construction or follow us on Twitter @ASTMBuildings. ASTM Committee D01 Next Meeting: June 24-26, in conjunction with the D02 June meeting, San Francisco, Calif.
Technical Contact: Keith Alderfer, Dow Chemical Co., Spring House, Pa., Phone: 215-619-1542; kalderfer@dow.com
ASTM Staff Contact: Jeffrey Adkins, Phone: 610-832-9738; jadkins@astm.org ASTM PR Contact: Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org

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