Knowledge

How to check the quality of glass screen protector?

Date:2023/05/08

Drop ball tester

A 50g steel ball is dropped from a height of 500mm to test the tempering effect and the quality of potassium nitrate.



VMS

It is used to detect the edge smoothness and edge chipping accuracy of mobile phone glass, etc. It is used for testing after the CNC and Printing processes. And it can also be used for drawing.



Friction tester

Use it in conjunction with a water drop angle tester. And use the water drop angle tester to test after friction 1500-3000 times; good quality fingerprint oil will lose 5°.



Water drop angle tester

Test the smoothness of the glass surface. After spraying fingerprint oil on the protective sheet, test the surface smoothness at an angle of 90°-110°.