ISO/TS 19857 is a standard that serves technical specifications for a laboratory test method for offset ink setting that determines the printability of paper, board and printing inks which prevents ink sets-off, bad adhesion and uneven toning.
ISO/TS 19857 describes a laboratory test method, using an IGT type or a prüfbau type printability tester for preparation of specimens to evaluate the absorption rate of an ink on a substrate in offset lithography by setting-off the printed surface to an unprinted surface.
The method described in ISO/TS 19857 gives testing with an amount of ink simulating either single color or multi-color printing. The print and the set-off print (counter print) are made with interval times, between print and set-off, common for the target process.
ISO/TS 19857 on laboratory test method for offset ink setting applies to:
The absorption properties of the paper are of great influence in offset lithography printing. Inappropriate absorption can lead to numerous printing problems such as ink set-off, bad adhesion, mottling, unpredictable tone value increase, poor rub resistance, damaging of first printed side on perfecting presses after perfecting and others.
ISO/TS 19857 shows you the test method to evaluate the ink setting characteristics of a specific ink/substrate combination in offset lithographic printing which allows you to enhance the quality of paper and boards.
ISO/TS 19857 gives detailed specifications for a laboratory test method for offset ink setting such as apparatus, materials, test methods, procedures for assessing the printability of paper.
ISO/TS 19857 gives you information on apparatus and material, test method, procedure and assessment which standardizes the absorption quality of the paper, as it is a great influence in offset lithography printing.
Thus, ISO/TS 19857 helps its users to customize the printability of a paper by verifying the offset ink setting, as the more absorbent the paper is the less time will be needed for the ink to set sufficiently for further processing.
ISO 19857