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ASTM Paint and Coatings Committee approves 2 new standards.

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September 29, 2009 - ASTM D7489, Practice for Evaluating Touch-Up Properties of Architectural Coatings Under Various Environmental Conditions, covers variations in color, gloss, and sheen that impact touch-up capacity of paint. To assess capability of architectural coatings for blocking ink stains from bleeding through to topcoat, paint companies and raw material suppliers will be able to use ASTM D7514, Test Method for Evaluating Ink Stainblocking of Architectural Paints Systems by Visual Assessment.

ASTM Paint and Coatings Committee Approves New Standards on Touch-Up Properties and Ink Stainblocking


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ASTM International
100 Barr Harbor Dr., Box C700
West Conshohocken, PA, 19428-2959
USA



Press release date: September 25, 2009

W. CONSHOHOCKEN, Pa., September 25, 2009-ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications, has approved two new standards that cover architectural coating touch-up properties and ink stainblocking of paint systems. Both new standards are under the jurisdiction of Subcommittee D01.42 on Architectural Coatings. Touch-Up Properties
When a home is being constructed, paints are subjected to a wide variety of drying conditions, which can lead to differences in appearance between the original coat and subsequent touch-up areas after the paint has fully cured. A new standard, ASTM D7489, Practice for Evaluating Touch-Up Properties of Architectural Coatings Under Various Environmental Conditions, covers variations in color, gloss and sheen that impact the touch-up capacity of a paint. According to Douglas Mall, D01.42 member and architectural coatings applications and formulation development specialist, UCAR Emulsion Systems and Monomers, ASTM D7489 brings together a variety of different testing protocols that have been used for touch-up evaluation. "By using ASTM D7489, it will be easier for contractors to communicate with laboratories what conditions generated product failure, with a much better chance of the laboratory being able to replicate the failure and make changes that would correct the product deficiency," says Mall, who also notes the standard will be used by chemists in paint laboratories as well as technical service personnel in the field. Future work on ASTM D7489 will include reproducibility and repeatability studies, especially in the area of spray application. "The next step for this standard is to develop it further as a test method, selecting more common application methods and conditions," says Mall. "We would like to get feedback on the current practice and its usefulness." Ink Stainblocking
Paint companies and raw material suppliers will be able to use a new ASTM standard to assess the capability of architectural coatings for blocking ink stains from bleeding through to a topcoat. The standard, ASTM D7514, Test Method for Evaluating Ink Stainblocking of Architectural Paint Systems by Visual Assessment, represents a compilation and synthesis of methods that are currently being used to evaluate stainblocking. According to Neal Rogers, group leader, research and development, Cook Composites and Polymers Co., ASTM D7514 is the result of a survey taken by Subcommittee D01.42 of various methods for measuring the stainblocking capabilities of coatings. "The development of ASTM D7514 provides a means to critically evaluate and differentiate between different resin technologies used in the manufacture of stainblocking primers," says Rogers. Rogers notes that, while ASTM has a test method for the assessment of stainblocking tannins in wood (ASTM D6686, Test Method for Evaluation of Tannin Stain Resistance of Coatings), many coatings, particularly interior paints, are applied to previously painted surfaces rather than the bare wood that is covered by ASTM D6686. ASTM Paint and Coatings Committee Approves New Standards on Touch-Up Properties and Ink Stainblocking/Add one ASTM International standards can be purchased from Customer Service (phone: 610-832-9585; service@astm.org) or at www.astm.org. For technical information, contact (D7489) Douglas Mall, UCAR Emulsion Systems and Monomers, Cary, N.C. (phone: 919-469-6717; malldd@dow.com); (D7514) Neal Rogers, Cook Composites and Polymers Co., North Kansas City, Mo. (phone: 816-391-6279; rogers@ccponline.com). Committee D01 will meet Jan. 17-19, 2010 in Ft. Lauderdale, Fla. ASTM International welcomes and encourages participation in the development of its standards. ASTM's open consensus process, using advance Internet-based standards development tools, ensures worldwide access for all interested individuals. For more information on becoming an ASTM member, please contact Jeffrey Adkins, ASTM International (phone: 610-832-9738; jadkins@astm.org). Established in 1898, 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 around the globe. Contact:
Barbara Schindler, ASTM International
100 Barr Harbor Drive, W. Conshohocken, PA 19428
610-832-9603; bschindl@astm.org, www.astm.org
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