Homebrew PCBs

Motif,

Look here,

http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/26532

and in particular at this patent,

IMAGE-FORMING PROCESS 5556735 (Google Patents)

The only sensitizer, other than one of the dichromates, that an individual can buy is diazo. I don't know if diazo will work with gum, but it does work with PVA/PVAac emulsions. Search for Speedball Diazo. There are a lot of patents for sensitizers, but you need a PhD in organic chemistry to understand them.

Baxter

> 1) I would like to know is there any alternative which is more safe, easily available and economical when compared to potassium/ammonium bichromate? I don't want to go for toner transfer or dry film option, only photo-resists.
>