This range of inks can be coated in a few different ways, curtain coating, screening, and electrostatic spraying. Curtain coating is done on a machine in which the boards are fed on a conveyor through a Niagara Falls of the ink. Electrostatic spraying is like normal pain spraying, but a high voltage charge exists between the spray gun and panel.

In all cases the solder resist pattern is then transferred by aligning a photographic master and exposing using U.V. The panels then require developing in a mild alkali solution followed by high temperature baking. More expensive than the two pack epoxy inks but very high definition. Photo-Imageable S/R masks can have zero clearance, and are available in a large range of colours. Oddly enough these colours include black, which to date has always worked without incident. Quite how the UV successfully polymerizes through the black ink is a mystery, obviously it's time to re write rules and laws of science.