Permanent ink has become a standard for marking errors on printed circuit boards in electronic companies worldwide.

Permanent ink is a water based, flexible, non-conductive, and water-resistant ink that may be applied from our Metron Marker pen to almost any surface, including Teflon, and even where an oily film is present. Adhesion will, of course, vary with the surface to which it is applied. Waterproof, non-toxic, and flexible, with some solvent resistance, Permanent ink is used in electronics, medical, aerospace, communications, museums, horticulture, and various other industries.