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I think it's now considered "chassis" or front panel material. That off green, nearly pastel seaweed color. HP probably still has the color code somewhere in their archives. I remember that color like it was yesterday. The "new" boards(90's) were the modern green. The old or milspec/aviation boards were that translucent bluish green. As for dying them, I recall the company that made "oaktree" solvent made dyes for fiberglass. I don't think oaktree is available to civilians even 30 years later, but the dyes should be. The solvent was the only earthly thing I've ever seen that could "unpot" full millspec/visa code chip assemblies, fully embedded in xray proof epoxy. I think that stuff was $1k a quart. The dye was as cheap as any other dye.
On Nov 16, 2016 8:50 AM, "'Brad' unclefalter@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:Here’s a comparison shot. On the left is an original 1974-vintage Mark-8 board. On the left is the closest ‘natural green’ PCB material I could find thus far. They’re not impossibly far off, but there is I think more of a bluish hue to the Mark-8 board. I’m wondering, could I dye my modern stock to look like the Mark-8? Or does anyone make something similar to that color now?
https://drive.google.com/file/ d/0B4pq0- BHd2x6MC03a2lzeU1ESlk/view? usp=sharing