The I. G. T. Printability Tester is a miniature cylinder press, which operate at accelerating speed .It is designed by Instituut voor Grafische Tecknick TNO, Holland.
We have carried the test of picking registance about art paper and examined the conditions of picking registance, printing difference of the both side, and relation of directional properties of paper.
On the test, we used pendulum Pe, attachment A and B. Pe is falling pendulum weight, max speed is 230ft/min. A and B are spring load driving, the former is 500ft, imin at max speed, the latter is 750ft/min at max speed.
Ink for testing paper is S. G. medium of Dainihon-ink.
It is concluded, (1) at the temperature 20-30·C, S. G ink is stronger than the standard, (2) by S. G ink, data of picking registance increase to up-wards curve line, according to temperature. (3) when inking time is long, decrease picking registance as linear, (4) kinds of spring tension, 25kg, 35kg and 50kg, gave the same results.
(5) Twelve strips of covering are suitable for the test. (6) Using the same sample, three kinds of printing speed are not the same result between each. Pe>A>B
(7) About the inking film, when it is printed parallel to machine direction, moreink cause strong picking registance. (8) The parallel printing to machine direction are stronger than cross direction on both sides of paper.