There is a change in the method of Stretch Test, so i share it below.

[When the fabric is pulled by 1mm and the force is less than 0.01kgf]

1. Pull the fabric until the force value is 0.01kgf.

2. Starting with the length reached at step 1, check the length and force of each 10mm increment.

3. Record 10 sections.

4. Use a value only when the force difference of each section is at least 0.02kgf.                                                                                                                                                                                                                               (If the force difference for each interval is less than 0.02kgf, do not use that value.)

5. Finally, select and use values resulted in at least 3 sections and up to 5 sections.                                                                                                                                                                                                                        (We recommend that you fill out all five sections as much as possible because the more measurements you have, the more accurate the data is.)

[When the fabric is pulled by 1mm and the force value is over 0.01kgf]

1. Check the value of the force when fabric is pulled to 1mm.

2. Starting with the length reached at Step 1, check the length and force of each 1mm increments.

3. At this time, measure 3 to 5 sections.                                                                                                                                                                                                                                                                                                                  (We recommend that you fill out all five sections as much as possible because the more measurements you have, the more accurate the data is.)