Do you know this ????? Re: Liquid Emulsion on Acrylglas...

On Sat, 18 Jun 2005, davidhatton wrote:

> Hi,
>
> this is from the rockland colloid website
> /
>
>
> Gelatin Precoat (Subbing)
>
> /
>
> /This is a traditional process for making photographic emulsions like Liquid
> Light and Ag-Plus stick to glass and glazed ceramics. It consists of an
> extremely thin layer of gelatin coated on chemically-cleaned glass. Liquid
> Light bonds to this thin layer, fusing with the glass so that the image seems
> to be virtually embedded in the glass or ceramic surface. Is it worth the
> extra effort?/
>
> /Subbing is more time-consuming than using glossy varnish. However, the
> materials for the process are easily available at grocery stores, and the
> extra effort pays off with the enhanced appearance of the print. /
>
> /What materials should be "subbed"? The process is only for vitreous
> materials like glass, glazed ceramics, fired porcelain, natural rocks,
> marble, etc. On glass-resembling plastics like Lucite and Plexiglas, as well
> as on highly-porous materials like unglazed ceramics and plaster, do not use
> subbing; use glossy polyurethane varnish, following the instructions enclosed
> with Liquid Light./
>
> /Materials needed:
> You will need some unflavored gelatin such as Knox, sold at grocery stores,
> plus some powdered laundry detergent (do not use soap or dishwasher
> detergent, which leave a waxy film). Sprinkle one level teaspoon (approx. 3
> grams) of gelatin onto the surface of one pint (450 cc's) of cold water in a
> saucepan. Let it stand 15 minutes to swell the gelatin, then heat with
> stirring until the gelatin is dissolved (140º-160º F or 45º-56º C.)/
>
> /Procedure:
> Scrub and rinse the glass or ceramic (wearing rubber gloves) until the rinse
> water does not bead up as it drains off the glass but leaves a uniform,
> nearly- invisible film. Pour some of the hot gelatin mixture onto the glass,
> drain well and dry overnight in a warm place with low humidity and
> circulating air. (The remainder of the gelatin-water solution can be
> discarded.)/
>
> /Coating with emulsion:
> The glass is now "subbed" and can be coated with emulsion. Pour a surplus of
> Liquid Light on the glass, tilt to spread, and pour the surplus back in the
> bottle. Set the glass or ceramic on a level surface with cool circulating air
> to speed setting and drying. The glass can be exposed while the Liquid Light
> is still damp or dried thoroughly and saved for future use. /
>
> /*
> <http://www.rockaloid.com/instruc1.html#TABLE>*/
>
>
Received on Mon Jun 20 13:23:12 2005