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November/December 2008
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Printing Inks

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

Current demands for making standardized prints for color measurement require constant speed and impression with high repeatability and reproducibility. To meet these demands, Committee D01 is developing a proposed new standard, WK20204, Test Methods for Preparing Laboratory Prints of Paste Inks by a Motor Driven Printability Tester.

According to Wilco de Groot, managing director, IGT Testing Systems, and leader of the D01.56 task group developing WK20204, the foremost use of the proposed new standard will be the preparation of reference samples for color measurement in the ink and printing industries. In addition, WK20204 will have applications in any area in which a well-known and reproducible ink film is required, including testing for abrasion resistance, drying time, migration tests and food contact, among other testing areas.

According to de Groot, WK20204 is the first in a series of proposed standards describing methods for preparing laboratory prints on different types of machinery because it has been proven that it is not possible to get identical results with different instruments and an optimal result can only be achieved if settings and geometry are carefully determined and specified for each type of machinery used.

All interested parties are invited to participate in the continuing development of WK20204. “For a better understanding of the applications, it could be useful to have some more input form the converters/packaging industry,” says de Groot.

CONTACT

Technical Information: (WK20008) Richard Czarnecki, Superior Printing Ink, Teterboro, N.J.

Phone: 201-478-5660

(WK20204) Wilco de Groot, IGT Testing Systems, Amsterdam, The Netherlands

ASTM Staff: Jeffrey Adkins

Phone: 610-832-9738