ASTM Int'l Seeks Participation for Proposed Ink Stainblocking Standard - ASTM WK14688
May 1, 2007 // Published as a news service by IHS
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A proposed new standard being developed by ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications is designed to provide the coatings industry with an industry-wide method for evaluating the ability of an architectural paint system to block ink stains from typical markers and writing instruments from bleeding through primer or base-coat into a topcoat.
The proposed standard, ASTM WK14688 - Test Method for Ink Stainblocking of Architectural Paint Systems is under the jurisdiction of Subcommittee D01.42 on Architectural Coatings.
ASTM WK14688 will be used by chemists and paint formulators who evaluate architectural primer systems for companies in the coatings industry, said Neal Rogers, chair of D01.42 and technical services representative, Cook Composites and Polymers.
Rogers said that coating manufacturers will find ASTM WK14688 helpful for performance evaluations of interior primers and for benchmarking against competitive products. The proposed standard will also guide manufacturers of raw materials for coatings in evaluating coatings resins and additives on stainblocking performance.
In addition to manufacturers, architectural specifiers will be able to employ ASTM WK14688 as a tool to ensure that primers will block stains as claimed.
"For instance," said Rogers, "the Florida School Plant Management Association (FSPMA) maintains paint specifications that must be met in order for a coating to be recommended for application in public schools. One FSPMA specification, MP-38.1, requires a universal stainblocking primer to achieve a pass rating on an ink stainblocking test in order to be listed as a certified product."
Subcommittee D01.42 invites interested parties to participate in its standards developing activities. Rogers said that the subcommittee would be particularly interested in people who have experience with a method that employs the application of ink stains so as to allow assessment using color measurement techniques.
"Our current drafts of this method include a qualitative evaluation, such as a 1-10 rating scale, to rate how effective the coating is at blocking each stain," said Rogers. "If practical, we wish to make the method more quantitative in nature with spectrophotometer measurements to quantify the appearance effects of stains bleeding through the coating."
For technical information, contact Rogers at Cook Composites and Polymers at (816) 391-6279 or e-mail rogers@ccplonline.com.
Source: ASTM International.