Solder resist is the usually green lacquer like
coating which covers the major part of most modern circuit
It is specifically designed to both protect the
surface tracks and prevent solder bridges during soldering. The surface
often has traces of silicones or similar to promote these properties,
which can occasionally lead to strange effects and deformations in the
Comp Ref. layer when it is screened on top, or even prevent successful
clueing onto the surface of the PCB.
All the types of Solder Resists used as best
regarded as permanent and non removable. Although our tests have shown
that quite a few of the normal production Resists are lacking strength
to resist the new low clean fluxes. we are told that is due to the higher
level of solids in the older fluxes, which used to provide some form of
protection for Resist.
Although the standard colours are green, red,
blue, and black should you be after a unique colour we are always happy
to oblige by mixing the resists. Results are a little unpredictable,
but be guaranteed the outcome will be a unique colour!