My goldfish can't remember the question long enough to answere it.
" The strongest glue on earth" What kind of strong? Strong smelling?
I thought this was interesting...
If you have a color television set there is a good possibility that the critical part of the television tube, the aperture mask, was made using a photolithographic process with fish gelatin as the photoresist base.
Fish gelatin cannot chill set. It is therefore a thin runny mass at temperatures much around room temps and even below.
If you coat it to use as a relief image, you must remember that it should be exposed through the base to allow adhesion to the support, and since it is not chill set, it causes severe problems in manipulation and handling during exposure.
It is not widely used in photography due to a number of problems. There are extensive publications (patents) on this granted to Kodak and a number of other companies.
Bill - I sold all the coating equipment to Bud and the Formulary, and have been using the Fotokemika (Efke brand) film that was coated using my formulation. They coated 3 miles (3 master rolls) of the stuff and I have a freezer full of it. The coating setup was just used to develop the emulsion and make a few prints, I probably could have done that by hand coating, but the original intent was to be able to make 30x40" prints with my home-made matrix film. I did make quite a few 20x24" prints that turned out nicely. Still... you can't beat just taking sheets out of a box for simplicity! The only reason I started the project at all was because I had lots of equipment for making DT prints, and no source of film. I wouldn't have undertaken the project if the film had been available commercially. Talk about the Mother of Necessity!
Originally Posted by wildbillbugman
Regards - Jim
It won't chill set, but it will dry right? Though, I can see how that would be very annoying actually... having to lie flat until dry.
One could add a little fish glue to normal gelatin to lower the gel temperature.
All of my emulsions must dry, rather than set. I just put them horizonaly in drawers. Depending on RH they take between 12 to 72 hours to dry. No big deal.
Well, there you go! Maybe fish gelatin emulsions can be a nice middle ground for vegetarians that east fish, but not other meat. Vegans can stick with Bill's polymers....
Ives' used stained fish-glue reliefs on celluloid to make his Kromskop color pictures. I wonder if there's an advantage for anything?