Many people told us that printing matt ink on EBG material is not good for membrane switches. Mainly because the adhesion isn't long-lasting. But usually, the membrane keypads need to use the EBG material which is anti-scratch. In order to solve this problem and also prove that it can be printed matt ink on EBG material, LUPHI ELECTRONICS did some experiments.

Below are the details:

We tested 5 different types of clear varnish ink on EBG PET material for membrane switches.

UB-1, UB-2, B-15, 09-CL2KG and 09-CL5KG

Membrane Switches Printing Development: Our Discovery

• The adhesion capability of B-15 is the worst.
• UB-1 and UB-2 are much better.
• 09-CL2KG and 09-CL5KG are the best, with no dropping of the ink after did various kinds of testing.

Through UV oven parameters:

Three light tubes are lighted together, rotation speed set 35, pass through twice.

Testing methods: scratching testing, embossing testing, and cutting testing.