Signature Plastics uses a two-part epoxy based ink to pad print keycaps. Typically, pad printing is used for front printing where legend wear is not a concern. However, historical testing suggests that legends printed on the touch surface of a keycap will withstand approximately 100,000 keystrokes before noticeable wear is observed. To extend legend life, a UV curable hard coat can be applied to pad printed keys for an additional fee.
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