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

The reason for the negative photoresist is cost. I can buy the
photoresist in a spray-on bottle MUCH cheaper than I can find the
positive resist. I can also buy clad boards cheap on E-Bay. So,
using the negative resist is the cheapest way for me to go. I make
a lot of mistakes on layout and such (and of course learning) so I
end up making some boards many times before getting it right.

If the pre-treated boards were cheap enough, I would go that route
right away, but I am just trying to save a few bucks.

As for the scaling issues with the laser printer, it has to do with
scaling in one axis versus the other. I forget which way it is, but
for example the 11" side needs to be scaled and not the 8 1/2"
side. So, rather than fight that, I would prefer to go with the ink
jet for the same reason others have stated - very high accuracy.

Thanks for all the help and suggestions guys!

Chris