re why circuit boards are green fiberglass boards are available in several colors sitting right here i have unetched board stock that is white blue green and yellow respectively i ve also seen black boards solder mask is available in a variety of colors too depending on the supplier the color helps indentify the material don t forget conformal coating i don t think i ve seen phenolic impregnated paper boards in anything other than the familar brown but it would not be difficult to add a dye to change the color bill mayhew neoucom computer services department rootstown oh usa phone wtm uhura neoucom edu n wed
