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ASTM Standard helps determine open time for latex paint.

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April 1, 2011 - Developed by Subcommittee D01.42 on Architectural Coatings, ASTM D7488 provides means of determining the time available in which paint can be worked into previously painted area. Open time is a key performance property for coatings, particularly for brush applications. According to Carol Hawkins, a scientist with Dow Chemical Co., and chairman of D01.42, as we move away from using solvents in coatings, it is important to develop a test method that formulators can use to determine open time.

New ASTM Standard Provides Means for Determining Open Time for Latex Paint


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Press release date: March 29, 2011

W. CONSHOHOCKEN, Pa., - A new ASTM International standard provides a means of determining open time. Open time is the time available in which the paint can be worked into a previously painted area. Open time is a key performance property for coatings, particularly for brush applications. ASTM D7488, Test Method for Open Time of Latex Paints, was developed by Subcommittee D01.42 on Architectural Coatings, part of ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications. "Historically, solvents used in coating formulations assisted in delivering good open time of a formulated coating," says Carol Hawkins, a scientist with Dow Chemical Co., and chairman of D01.42. "As we move away from using solvents in coatings due to changes in regulations for volatile organic compounds, it is important to develop a test method that formulators can use to determine open time of a coating." Hawkins says that the formulators who will use the standard would likely represent manufacturers of architectural paints and paint additives. According to Hawkins, participation is always welcome in D01.42. "We welcome a broad group of participants into our subcommittee, including manufacturers of raw material and paint, as well as consultants," says Hawkins. To purchase ASTM standards, visit www.astm.org and search by the standard designation number, or contact ASTM Customer Relations (phone: 610-832-9585; service@astm.org). ASTM International welcomes and encourages 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. View this release on the ASTM Web site at www.astmnewsroom.org. ASTM Committee D01 Next Meeting: June 19-21, 2011, in conjunction with ASTM D02 meeting, Baltimore, Md.
Technical Contact: Carol Hawkins, Dow Chemical Co., Spring House, Pa., Phone: 215-619-5724; chawkins@dow.com
ASTM Staff Contact: Jeff Adkins, Phone: 610-832-9738; jadkins@astm.org
ASTM PR Contact: Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org
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