ASTM Seeks Participation on Stainblocking Standard
According
to Neal Rogers, chair of D01.42 and technical services representative, Cook
Composites and Polymers, WK14688 will be used by chemists and paint formulators
who evaluate architectural primer systems for companies in the coatings
industry. Rogers says that coatings manufacturers will find 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.
Subcommittee D01.42 invites interested
parties to participate in its standards-developing activities. Rogers says 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,” says 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.”