Over deze norm
This International Standard specifies an accelerated speed method for determining the surface strength in terms of the pick velocity and pick resistance of coated and uncoated paper and board, and in terms of the delamination 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 local imperfections such as surface debris. This test is especially important for papers and boards which are to be printed in lithographic offset or letterpress, 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 is also useful in that field. In the interpretation of the test results, attention must be given to the fact that the results can be seriously influenced by differences in testing conditions, differences in instruments and differences in the calibration state of the test equipment. The pick velocity, etc., determined here should not be interpreted as being the running speed of a printing press in practice.
||Papier en karton - Bepaling van de plukvastheid met behulp van het IGT-proefdruktoestel (elektrisch model)
||Paper and board - Determination of resistance to picking - Accelerated speed method using the IGT-type tester (electric model)