U of S | Mailing List Archive | alt-photo-process-l | Re: Liquid Emulsion Questions

Re: Liquid Emulsion Questions

Polyurethane varnish also works pretty well with liquid emulsion.  As John
mentioned, I would recommend coating the entire board to completely seal
it from the chemistry...that way the wood won't warp.

Camden Hardy


On Sun, September 24, 2006 10:20 am, John Cremati wrote:
>           I have coated wood with  thick layers of a diazo  emulsion in
> the
> past....... What I did was to apply numerous coats of a  sandable  sanding
> sealer to the wood sealing it totally....... I only needed it done on the
> front but from what I can see in your case, you would have to do the
> entire
> piece.........  I imagine lacquer or shellac would work as well.... The
> soak
> time frame may be limited though depending what you use........... If you
> do
> not do this you will get sever warpage  beginning almost immediately even
> if
> you just coat the surface......
>        Is it possible that you just coat  only the front  surface using a
> brush on method and then create a dam around the peice to devlelope , fix
> and rinse.....
>      Also You could build a  recirculating flood system by just drilling
> small holes over  a length of PVC, caping it at one end and then run a
> tube
> to a small pump and well in some sort of tray set up.......This would
> minimize your chemicals and you could just tape of the back using visquine
> or cut a piece of plastic plexi and tape that in place......
> You may also want to look into Sandy King' s method of coating paper for
> Carbon Printing .
> John Cremati