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New Standard Underway for Pigment Loss
ASTM is proposing a new standard that will provide definitive instructions for conducting a pigment loss on ignition test.
Pigment manufacturers frequently use the test to determine water of hydration or crystallized water. Currently, however, the test methodology is embedded within other standards and varies from one to another, according to ASTM.
ASTM WK46877, Test Method for Pigment Loss on Ignition, is being developed by Subcommittee D01.31 on Pigment Specifications, part of ASTM Interational Committee D01 on Paint and Related Coatings, Materials and Applications.
Test for 'Product Validation'
"Manufacturers will use the results of testing as a means for product validation," said Steven Brunner, application chemist at WPC Technologies and the committee's technical contact.
"For example, in the realm of anticorrosive pigment, WK46877 will serve as a means to estimate the amount of active portion in the pigment."
Brunner said the test would be used to determine both the acceptable and detrimental levels of water for different types of pigments.
The subcommittee is also considering the development of a standard for pigment grind method.
Developing Standards
Interested parties are invited to join in the standards developing activities of D01.31. The next Committee D01 meeting will take place Jan. 25-27, 2015, in New Orleans, LA.
For technical information, contact Brunner at sbrunner@wpctech.com or 414-225-2415.
