BASIS WEIGHT – GRAMMAGE
Purpose of the test
This test is performed to determine the weight in g/m² of paper, solid board or folding board.
Procedure
Operate the instrument in accordance with ISO 536 and the manufacturer’s instructions.
Leave the samples exposed for 24 h to 23°C and 50% R.H., according to ISO 187.
Check the zero setting of the balance.
Cut 20 test pieces to the required size.
Weigh each piece to your normal precision.
Report 20 measures in g/m², their mean and standard deviation calculated to 3 significant figures.
ISO 536
Nr. of samples
20 test pieces per level
Sample size 150 x 150 mm²
Special size A4
Levels
Level 1: 55.0÷65.0 g/m²
Level 2: 85.0÷105 g/m²
Level 3: 270÷290 g/m²
Reporting
Report 20 valid results of measurements in g/m², their mean and their standard deviation. All to three significant digits.
CEPI test 1.3
