Plating is the most complex process associated with circuit production by screen printing. The formulation of a plating resist is critical; it must withstand long plating periods in either acid or alkaline baths and various pre-cleaning processes. Plating resists must not contaminate plating baths and afterwards must be readily removable in either organic solvents or aqueous solutions. They must also be capable of very fine print definition; i.e. capable of producing circuit patterns with tracks and gaps of between 200 - 250m. (8-10 mil.).