That occurred to me, also. I have some emulsion sitting around,
although it may be out of date.
Other things to test:
3. Will it resist etch?
4. Can you get it thin and smooth enough?
The steps would be:
Clean board.
Coat with emulsion.
Let dry in dark room.
Print artwork to transparency, reversed and negative.
Place transparency over board, toner down.
Cover transparency with glass to keep everything flat.
Expose to direct sunlight for 60 seconds.
Wash board with water to remove unexposed emulsion.
Etch board.
Remove emulsion.
Acetone or Denatured alcohol might remove emulsion, saving a bit of
money over emulsion remover.
Give it a try and report back to us! ;)
Kerry
aurangzebhaque wrote:
> Hi everyone,
>
> I wonder if it is possible to use the photo sensitive Emulsion used in the silk screen making process directly on the blank PCB copper surface. I realize that in the silk screen process there is the silk mesh in which the emulsion gets trapped and then hardens to form the "screen". The idea that I would like to test is whether:
>
> 1.Will the emulsion initially stick to the copper surface?
> 2.Will a screen be formed on the copper surface as it does in the case of the silk screening process?
>
> Any comments most appreciated.
>
> Thanks and regards
>
> Aurangzeb
>