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Photo Forum / Film Photography / Darkroom / April 2004B&W photos on clear glass
I saw some black and white portraits printed on glass in a store. Does anybody know where I could start looking to find out how to do this process? A google search turned up nada. Any help would be appreciated. Google search on "Glass Plate Photography"or "making photographic plates" - will give lots of hits ( many dups of course). Essentially what you want to do is find a formula for photo emulsion, carefully coat one side of a glass plate, dry, expose and develop as "normal". One caveat is that the early formulas were highly flamable. Good luck in your search. Gordon > I saw some black and white portraits printed on glass in a store. Does > anybody know where I could start looking to find out how to do this process? > A google search turned up nada. > > Any help would be appreciated. >Essentially what you want >to do is find a formula for photo emulsion, carefully coat one side of a >glass plate, dry, expose and develop as "normal". Now where would one find a formula for an emulsion ? OH, I know ! http://www.darkroompro.com Imagine that ! Regards, John S. Douglas, Photographer - http://www.darkroompro.com Please remove the "_" when replying via email > I saw some black and white portraits printed on glass in a store. Does > anybody know where I could start looking to find out how to do this > process? > A google search turned up nada. I think you have two options: you can make glass plates with a print emulsion, or you can bind print film in glass. I think Kodak still make Tech Pan on plates, and Lantern Plates, both of which could work well, but last time I saw the prices they were horribly expensive. There are several brands of ready made liquid emulsions suitable for printing on the market. The most widely available one is Rockland Colloid's Liquid Light. They have instructions on their website <www.rockaloid.com> for coating glass plates with Liquid Light. You could also use a print film such as Kodak 7302 or Maco Genius Print Film, and bind it between two thin sheets of glass after the manner in which people used to bind lantern slides. This could look quite a lot like an image printed on glass. Peter.  Signaturepirwin@ktb.net Was the image really _on_ the surface of the glass, or was it possibly between two layers? And was it glass or possibly plexi? I ask because it might just be a print on film and embedded. A liquid was poured on glass and dried as stated by the other poster. > A liquid was poured on glass and dried as stated by the other poster. So it was a positive transparency. Dan On 4/11/2004 1:34 AM Dan Quinn spake thus: >> A liquid was poured on glass and dried as stated by the other poster. > > So it was a positive transparency. Yes, I think it's safe to assume that if the O.P. said, as he did > I saw some black and white portraits printed on glass in a store. that he means a normal, positive image printed on glass, not a negative one. Why would anyone assume otherwise? SignatureMy coffee was beginning to wear off and with it the momentary illusion it gives that things are Right and life is Good. - James Thurber, from the short story _The Black Magic of Barney Haller_ > Was the image really _on_ the surface of the glass, or was it possibly > between two layers? And was it glass or possibly plexi? I ask because it > might just be a print on film and embedded. I would imagine you could use a coated glass plate (Liquid Light (R) or home brewed) as the printing 'paper' and print a negative onto it. This would provide the same effect and would actually be a very viable 'print'. >I would imagine you could use a coated glass plate (Liquid Light (R) or home >brewed) as the printing 'paper' and print a negative onto it. This would >provide the same effect and would actually be a very viable 'print'. I wonder how the emulsion would adhere to the glass though ? According to Ilford the binding of the emulsion to the substrate is half the challenge of making a film. Regards, John S. Douglas, Photographer - http://www.darkroompro.com Please remove the "_" when replying via email >>I would imagine you could use a coated glass plate (Liquid Light (R) or home >>brewed) as the printing 'paper' and print a negative onto it. This would [quoted text clipped - 3 lines] > According to Ilford the binding of the emulsion to the substrate is > half the challenge of making a film. There are instructions for "subbing" - making the emulsion stick to the glass - on their website <www.rockaloid.com/instruc2.html#SU>. Peter. Signaturepirwin@ktb.net >>>I would imagine you could use a coated glass plate (Liquid Light (R) or home >>>brewed) as the printing 'paper' and print a negative onto it. This would [quoted text clipped - 8 lines] > > Peter. Something seems to be missing from the instructions or is a bit confusing. Do you pour the gelatin on the glass while the glass is still wet? Or do you dry the glass between the cleaning/washing and the pouring the emulsion onto it? And it does not mention that pouring the emulsion onto the subbed glass should be done in darkness or under safelight conditions as well as the drying of the plate. This should be obvious but I can see someone posting a message here "my emulsion on glass came out all black...? Bert Perhaps OT... but... Years ago, I got my hands on a wholesale craft supply catalog from a large firm near Chicago... I dont remember their name, but I do remember they had all kinds of provisions to keep civilians from ordering stuff.. along with all the bits and pieces in the world for making tacky tiffany lights etc, they had all kinds of nifty toys.. anealing "ovens" that were firebrick containers for zapping enamel jewelry in an old microwave, acid etch paste etc and....... A photo-sensitive sandblast mask goo.... Not only could it be brushed on and contacted to a high contrast neg with strong UV, but upon "development, it would yield different thicknesses so that a constant sandblast would yield varying depth by exposure... YIPE! Not quite B/W emulsion on glass, but a lot better than xferring high contrast image by gluing it to plastic wallpaper, glued onto glass, cut out with xacto knife and sandblasted... Which was my way of "transfer" to glass Never got any... Find a tacky tiffany lamp kit craft store and see if they can go through their supplier catalog and order some... then find a sandblast service... or....... back to trying to get the silver emulsion onto the glass <grin> ---------------------- >>>I would imagine you could use a coated glass plate (Liquid Light (R) or home >>>brewed) as the printing 'paper' and print a negative onto it. This would [quoted text clipped - 8 lines] > >Peter. > I saw some black and white portraits printed on glass in a store. Does > anybody know where I could start looking to find out how to do this > process? A google search turned up nada. > > Any help would be appreciated. First, were these REAL silver halide photographs on glass or just b&w halftones printed on glass using normal printer's ink? Use an 8X loupe to examine them. If you see equally spaced, black dots of varying sizes, then it's a halftone print just like you see on the pages of magazines. Now, if you want to make real photographs on glass, there are two basic ways of doing it. The first is to coat the glass with a photographic emulsion, which is available, ready to go, from various manufacturers, then print and process as you would with normal photographic paper. The other method involves stripping the emulsion off normal b&w print film -- this is like regular photo paper, but the emulsion is on a clear film, not paper, base -- and adhering the emulsion to glass. An alternative to the latter method would be to use print film, printed and processed normally, and MOUNT it on the glass. This is by far the easiest way to obtain a print on glass. SignatureStefan Patric tootek2@yahoo.com >I saw some black and white portraits printed on glass in a store. Does >anybody know where I could start looking to find out how to do this process? >A google search turned up nada. > >Any help would be appreciated. "Liquid Light is a silver-gelatin emulsion designed to be easily applied to any material. Use it for photographs on wood, glass, ceramics, plastics, chinaware, fabrics, metals, stone, walls, artist's canvas, even an egg!" Regards, John S. Douglas, Photographer - http://www.darkroompro.com Please remove the "_" when replying via email |
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