BURSTING STRENGTH – board
Purpose of the test
This test is performed to determine the bursting strength of board.
Procedure
Operate the instrument in accordance with ISO 2758 and the manufacturer’s instructions.
Leave the samples exposed for 24 h to 23°C and 50% R.H., according to ISO 187.
Determine the bursting strength, one value per test piece with its marked side downwards towards the applied diaphragm pressure.
Ensure that all tests are performed at the standard pumping speed and that uncompensated burst pressure results are reported.
Report 10 valid measures in kPa, their mean and standard deviation calculated to 3 significant figures.
ISO 2759
Nr. of samples
12 test pieces per level
Sample size 150 x 150 mm²
Special size A4
Levels
Level 1: 100÷160 kPa
Level 2: 300÷400 kPa
Level 3:600÷700 kPa
Level 4: 750÷900 kPa
Level 6: 1100÷1700 kPa
Reporting
Report 10 valid results of measurements in kPa, their mean and their standard deviation. All to three significant digits.