The ISO TS 19857:2021 "Laboratory test methods for paper, Cardboard and Printing ink printability offset ink shaping" standard provides a laboratory test method for evaluating the solidification properties of offset inks on specific substrates. The method uses an IGT-type or prüfbau-type printability tester to detect the Absorbance and solidification of inks on substrates such as paper by simulating the printing process. The test involves transferring the ink film of a new printing product onto an unprinted substrate to evaluate the solidification behavior and surface tack of inks. The standard also takes into account the effect of paper absorbency on printing quality and provides testing protocols for different paper-ink combinations to optimize inks performance during offset printing.
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