Mistake 1: Offer Pantone Color No. C for sand surface
Customer should offer Pantone Color No. U for sand surface and Pantone Color No. C for glossy surface.

Mistake 2: Closed frame line is less than 4 mm from the outer edge off the membrane.
Printing tooling has error of +/-0.2 mm, closed frame line is difficult to be centered and is prohibited, but interrupted line can avoid the error and is permitted, as we can print interrupted lines separately.

Mistake 3: Use ZIF connector with slip clock as Interface connector.
That will damage silver circuit on the tail, the contact between ZIF connector and membrane switch’s silver tail will fail soon. That can only be used for FPC tail. correct connector please refer to https://www.sun-rising.cn/design-guide/

Mistake 4: Bending membrane switch sharply when assembling.
As LEDs are glued on screen printed flex circuit, bending may damage the contact between LEDs and circuitry and cause blind lamp; that also may cause broken metal domes inside.

Mistake 6: rip the membrane switch off the holding panel and repeat gluing
That may cause metal domes inside damaged by losing elasticity

Mistake 6: Offer Pantone color C for sand surface and offer Pantone U for glossy surface
Correct offer is that Pantone color C is for glossy surface while Pantone color U is for sand surface