Paint Masking Tape

Plating Masking Tape is a chemical-resistant masking tape engineered for selective electroplating and wet surface-treatment processes. Unlike thermal masking tapes designed for soldering or powder coating, this tape’s defining requirement is survival in an electroplating bath — resisting the acids, alkalis, and complexing agents of gold, nickel, silver, tin, copper, and chrome plating chemistry while holding a sharp, sealed boundary so plating deposits only where it should. It also provides electrical insulation on masked areas, blocking unintended electrochemical deposition on protected surfaces. The result is clean selective plating with well-defined boundaries and zero residue on the finished part.

A masking tape that performs perfectly in dry heat can fail completely in a plating line. The failure modes are specific to wet electrochemical processing: bath chemistry creeps under a poorly sealed edge and plates where it shouldn’t (“bleed-under”); aggressive acid or alkali attacks the adhesive and lifts the tape mid-cycle; or a tape with insufficient dielectric strength allows stray current to deposit metal on the masked surface.

Plating Masking Tape is formulated to prevent all three. The backing resists chemical attack across common plating chemistries, the adhesive maintains bond strength when fully immersed in wet baths, and the tape provides electrical insulation that suppresses unwanted deposition on covered areas. Consistent adhesive coating weight and film thickness produce a uniform sealed edge — the single most important factor in achieving sharp plating boundaries on connector pins, contact pads, and gold fingers.