Why is the weight weight of the paint film abrasion instrument belt inconsistent? The above mark is 1000g, and the weighing is only 750g; the 500g is only 250g, and each is 250g less.
QGY paint film stackable tester can this tester without metal baseplate? Want to use PET, PP, PCTG, ABS as baseplate to test the damage resistance of the above coating
I read this, and the final judgment is still a little vague. There are 1-7 grades. How to define which grade it belongs to, and which grade is complete to what extent. I didn't explain it in detail.