Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
>The rest is mostly fire retardancy and electrical properties that 
>mostly don't matter.

Good to hear for a cheapskate like myself. I bought something like a 
12" square piece a while back locally, and it was like 15 or 18 
dollars. I got a lifetime supply (10pcs) of that beige CEM-1 in 
10"x24" from a guy that sells on eBay for 20 bucks. :)

FWIW- That was Chris from www.pcbmaterialworld.com
           -eBay name was ACGIII

I just looked at some of his completed auctions and he had FR-4 and 
CEM-3 bundles, but the pictures all had the same white edge like my 
CEM-1 (could just have used the same photo). Good guy to deal with 
regardless (I think he's in Illinois).

On the paper residue, it would seem like a mild water-based black 
latex would soak into that stuff and could be overcoated when dry. At 
the very least, I can't see it letting the gray reappear, even if it 
didn't make a really solid coat. It also might be weak enough that you 
could just wipe it on with a wet paper towel and have it mainly take 
to the paper, or you could wipe the black residue from the surrounding 
board afterward (don't know). It sure would be a nice trick, as that 
paper seems to transfer differently than most. Also would be great if 
it would absorb some more interesting colors too!

                              -George

PS- Just got my Reynolds "Release" foil, and was able to merely sit 
here on my a$$ and wait for it. ;) (there was a grocery run happening)