Bertech Water Soluble Masking Tapes are made from a poly-vinyl alcohol (PVA) backing with a synthetic water soluble adhesive. They are designed to mask gold fingers on printed circuit boards during wave soldering. There is no adhesive residue after removal of the tape. They have a low static charge upon liner release and when taping the board. Humidity extremes do not affect tape properties. They are packaged in a 36 yard-long rolls with a Kraft paper liner on a 3 inch polyethylene core.