re why circuit boards are green ulan ee ualberta ca dale ulan writes kuusama kaarne cs tut fi kuusama juha vtt writes not that the question is anything important but i am still curious why is that almost all printed circuit boards are green i have seen a few blue ones but no red yellow company logo etc is there a technical reason or could it be that the marketing geniuses have not tought about it yet it s possible to make boards in other colors and i have an ad for laser light show equipment which offers the circuit boards in your choice of day glo tm colors the usual light green color is just the natural color of fiberglas the dark green or blue is the solder mask layer and i suspect that color is a dye john nagle
