Participation is sought for two proposed new standards being developed by ASTM International Committee D01 on Paint and Related Coatings, Materials and Applications. The proposed standards, WK20008, Practice for Block Resistance of Inks and Coatings, and WK20204, Test Methods for Preparing Laboratory Prints of Paste Inks by a Motor Driven Printability Tester, are both under the jurisdiction of Subcommittee D01.56 on Printing Inks.
WK20008, Practice for Block Resistance of Inks and Coatings
According to Richard Czarnecki, vice president, technology, Superior Printing Ink, and chair of Subcommittee D01.37 on Ink Vehicles, blocking occurs when printing ink transfers from the printed surface to an adjacent printed or unprinted surface, for example, in a roll of material or in stacks of printed sheets. Printing inks that block create printed matter that is unacceptable for commercial use.
“Block resistance is an important performance requirement for printed materials and to date there have been no efforts to establish an industry-wide standard for measuring and rating the resistance of printed materials to block to adjacent printed or unprinted surfaces,” says Czarnecki, who also notes that printing ink manufacturers and printers would find the proposed new standard most useful.
All interested parties are invited to participate in the activities of Subcommittee D01.56 in the development of WK20008. “We would especially like to see participation from printers who purchase printing ink, paper and plastics and convert these materials into printed articles such as newspapers, magazines, fliers and packaging,” says Czarnecki.
WK20204, Test Methods for Preparing Laboratory Prints of Paste Inks by a Motor Driven Printability Tester