TISSUE SOFTNESS
Purpose of the test
This test is performed to determine the softness of tissue paper with the EMTEC Tissue Softness Analyser TSA.
Procedure
Operate the instrument in accordance with the manufacturer’s instructions and the following settings:
- algorithm: “QA1”;
- side: “Yankee”;
- number of plies: “1”;
- thickness: “310” and “225” [μm] for Level 1 and Level 2 respectively;
- grammage: “20” [g/m2] for both Levels.
Leave the samples exposed for 24 h to 23°C and 50% R.H., according to ISO 187.
Perform the measurements on the indicated side.
During handling of samples, do not touch the area. Before measurement, ensure that no creases or other abnormalities exist in the area to be measured. If defects are present in a test piece, replace it by one of the reserve pieces. If more than 2 test pieces have defects, use the defective test pieces nevertheless and note the nature of the deficit and which number in the test sequence of this test piece.
Report 10 measures for each of the calculated HF-value, TS7, TS750 and stiffness D (mm/N), their mean and standard deviation calculated to 3 significant figures. Record the temperature and relative humidity of the room and if it is considered “quiet”, “slightly noisy” or “noisy”.
EN
Nr. of samples
12 test pieces per level
No special size
Levels
Hf:
Level 1: 50÷65 Hf
Level 2: 75÷85 Hf
TS7:
Level 1: 18÷28 TS7
Level 2: 10÷15 TS7
TS750:
Level 1: 63÷91 TS750
Level 2: 28÷37 TS750
D:
Level 1: 3.4÷3.9 D
Level 2: 3.5÷4.0 D
Reporting
Report 10 measures for each of the calculated HF-value, TS7, TS750 and stiffness D (mm/N), their mean and standard deviation . All to three significant digits.