Pad Quality Control
Poor-quality pads can destroy the performance of the printing machine. When you receive pads from your supplier, it's vital to check the pads for:
Blemishes on the print surface
Foreign particles on the print surface, such as wood splinters
"Nipples" on the print surface
Firm attachment of the pad to the base (the pad should be secure, with no air bubbles that can cause the rubber to come away from the base)
The desired hardness (use a durometer gauge to check hardness).
The positioning on the backing plate (it should be concentric, with its vertical center line at a 90° angle to the base)
The height (this is particularly important in multiple-pad applications)
Report any defects to your pad supplier immediately so that replacement pads can be furnished.