Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi guys,

I have almost given up on direct ink-jet resist and on "plotting"
with Staedtler pens using the CNC machine, and I am about to abandon
toner transfer. Only problem with toner transfer is the "scaling"
issues either through the printer or from the paper not being stable
which causes problem with CNC drilling.

Anyway, I ordered up some negative type resist chemical, the
developer, a lamp, and an exposure frame. I am not expecting this
to go "perfectly" either, but am hoping to have a bit less
frustration in other areas.

I am thinking the best accuracy I can get when printing is to use an
ink jet printer (I have Epson R220 and Epson CX6600). I have a PDF
editor program that allows me to edit trace colors and back ground
colors so that I can make negatives so that shouldn't be a problem.

The first "problem" I suspect I will run into is getting enough
density on the transparency to make sure the "black" areas are dense
enough to block out the UV exposure lamp where needed. Has anyone
run into this issue and how do you deal with it?

Any other pointers would be greatly appreciated as well as this is
my first time for "photo-processing".

Thanks

Chris