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This International Standard specifies an accelerated speed method for determining the surface strength interms of the pick velocity and pick resistance of coated and uncoated paper and board, and in terms of thedelamination resistance of the liner on paperboard, by simulating the behaviour in the printing process.Because of the limited area tested and the general character of the test, it will not usually detect localimperfections such as surface debris.This test is especially important for papers and boards which are to be printed in lithographic offset orletterpress, because the inks used in these techniques traditionally have a high viscosity and high tack values.Due to the increasing tendency for the tack and viscosity of modern flexographic inks to be high, this method isalso useful in that field.In the interpretation of the test results, attention must be given to the fact that the results can be seriouslyinfluenced by differences in testing conditions, differences in instruments and differences in the calibration stateof the test equipment.The pick velocity, etc., determined here should not be interpreted as being the running speed of a printing pressin practice.NOTE1Although IGT-type testers of the pendulum type are outside the scope of this International Standard, the describedmethod can also be used for these instruments. The results will be slightly different, due to the difference in velocity profile.NOTE2The use of the Westvaco type device and the use of tack-graded inks are not covered by this InternationalStandard.