The proposed standard, ASTM WK38233, Test Method for Dirt Pick-Up Resistance for the Films of Architectural Paints and Stains, is currently being developed by Subcommittee D01.42 on Architectural Coatings, part of ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications.

According to Amanda Andrews, chemist, Wacker Chemical Corp., and a D01.42 member, the proposed standard will focus on:

  • Standardizing a dirt composition
  • How to apply dirt
  • The removal of dirt
  • A rating technique for an exterior coated substrate compared to many years of outdoor exposure

Andrews notes that Primary users of ASTM WK38233, once approved, will be coating suppliers and manufacturers.

Andrews invites all interested parties to participate in the ongoing development of ASTM WK38233. “We are particularly interested in participation from those who already have in-house dirt pick up test methods with formulated dirt,” says Andrews. “We are also looking for participation from anyone who has interest in appropriate accelerated methods such as artificial UV and water conditioning.”

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