Print Penetration
Purpose of the test
This test is performed to determine the print penetration or oil absorption of paper, solid board or folding board.
Procedure
Operate the instrument in accordance with NEN 1836 or IGT W24 and the manufacturer’s instructions.
Leave the samples exposed for 24 h to 23°C and 50% R.H., according to ISO 187.
Set the printing speed (accelerated) to 1,25 m/s.
Set the printing pressure to 400 N for a 20 mm printing disc, 625 N for a 32 mm printing disc or 1000 N for a 50 mm printing disc.
Measure the length of the blot on the marked side of 10 test pieces with the marking in the clamp.
Use IGT print penetration oil for the test.
Report 10 measures in mm, their mean and standard deviation calculated to 3 significant figures.
Nr. of samples
12 test pieces per level
Sample size 55 x 340 mm²
No special size
Levels
Level 1: 100÷110 mm
Level 2: 120÷140 mm
Reporting
Report 10 valid results of measurements in m/s, their mean and their standard deviation. All to three significant digits.