Homebrew PCBs

On Tue Aug 8, 2006 8:44 pm (PDT), Herbert E. Plett wrote:
>2. Re: serigraphy photo emulsion as etch resist ?
>     Posted by: "Herbert E. Plett" cachureos@... cachureos
>     Date: Tue Aug 8, 2006 8:44 pm (PDT)
>
>your question makes me think of this:
>if you used a coated board (similar to the photo type) and use the printer to
>print the 'developer' (or solvent) on, could that be an alternative?
>[snip procedure]
>is this absolutely crazy???

No, nor new either: prior art in message 13667, Apr 21, 2006, 2:14 pm.

Perhaps all mihai_hagianu needs to do is to bake the developed
PVA image to make the colloid completely irreversible.
Colour is a good indicator - dark straw should be about right.

This definitely does work on a homebrew gelatin-dichromate
photoresist in acidulated ferric chloride etchant.


Regards, LenW