I think the general concensus is it will probably work, using the spinning method to achieve a thin uniform layer and baking it for a short while, then expose as normal, one less chemical to use as unexposed resist just washes off, not sure how well the exposed area will stick to the copper clad though, a few experiments should wrap it up though!
Another interesting alternative to the various PCB and Silk Screen chemicals available is to make it yourself!
A mixture of Potassium Dichromate [or bichromate] and Egg yoke, or dairy cream, will make a UV sensitive emulsion.[how this stands up to etching though........] not sure of the mixing ratios, but, it is toxic!! a carcinogenic, and chromium dermatitis are two of the more unpleasant results of getting in contact with the stuff!! it is sold on ebay amongst other places;
http://www.ebay.co.uk/itm/Potassio-bicromato-Kaliumdichromat-potassium-dichromate-/180861035286?pt=Laboratorio_e_Scienze_Mediche&hash=item2a1c286316if anyone would like to experiment?..........
David
--- In Homebrew_PCBs@yahoogroups.com, "mark" <STRIPES97_USA@...> wrote:
>
> That's a good question as I was thinking about the same thing when I got a screen printing setup a few months ago, but haven't had time to even do more then open the box to make sure everything was in the kit...
>
> --- In Homebrew_PCBs@yahoogroups.com, "David" <dgh2259@> wrote:
> >
> > Hi All,
> > After looking at Craig's fasinating PCB spinning methods, an idea came to mind, seeing as the regular chemicals seem to be rare and expensive, has anyone tried silk screen printing emulsions? this in not the inks but the chemical used to make the pattern in a very fine mesh, the emulsion is spread over the mesh with a squeegy and after exposure to UV through the pattern[design] blocking transparency, the unexposed area is washed out with running water, the exposed area remains and is really pretty tough, is this resistant to etching chemicals? would this method work? has anyone tried?
> > There would be no need to "develop" the PCB, just wash off with water!!
> > I may be way off track with this but any comments and/or suggestions?
> >
> > David
> >
>