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Photo Forum / Film Photography / Medium format / March 2004a question of B/W film
There was once a film made by Kodak, black and white which was not sensitive to red light, and could be as out in the open and undeveloped under red light, Pan - something I think ... anyone remember this? Does anyone know if something close is still made? I know some of Ansel's earliest work was done with it. Thanks all, Alex > There was once a film made by Kodak, black and white > which was not sensitive to red light, and could be as out [quoted text clipped - 6 lines] > > Alex Not "pan" something. The OPPOSITE of "pan" something. Pan is short for Panchromatic, meaning sensitive to all colors, the standard for B&W films since the 1950's. You are referring to ORTHOCHROMATIC film which was red-blind and can be developed by a red safelight. Why on earth would anyone want it now?  SignatureMichael Weinstein | Never underestimate the power of Nashua, NH | stupid people in large groups. > > There was once a film made by Kodak, black and white > > which was not sensitive to red light, and could be as out [quoted text clipped - 12 lines] > was red-blind and can be developed by a red safelight. Why on earth > would anyone want it now? Some was certainly made until very recently for use in document copying. Slow and fine grained, very high contrast, and because it was insensitive to red it tended to produce a good even black text on white paper print even if the paper of the original document was unevenly yellowed or had 'foxing' on it. Could be a fun film to play with - I used to like AgfaOrtho 25, but I haven't seen it on sale for a long time. Peter Try Kodak Publication F-5, 'KODAK PROFESSIONAL Black-and-White Films' for all the info on Ortho you could ever want. There are a bunch of them in there. If you can't find the pub, I'll gladly photocopy a few spec pages and mail them to you. FYI the following films are listed as orthochromatic (pub date 1998): KODAK PROFESSIONAL Commercial Film/4127 KODAK PROFESSIONAL Contrast Process Ortho Film/4154 KODAK PROFESSIONAL KODALITH Ortho Film, Type 3/2556 and 6556 KODAK PROFESSIONAL Copy Film/4125 KODAK PROFESSIONAL B/W Duplicating Film SO-132 > Date: Wed, 17 Mar 2004 04:20:43 -0000 > From: Bandicoot <insert_handle_here@techemail.com> [quoted text clipped - 28 lines] > > Peter > There was once a film made by Kodak, black and white > which was not sensitive to red light, Orthochromatic (sensitive to everything but red) and Colour-blind (sensitive to blue and violet) films are like that. Colour blind materials can be used under the same safelights as paper. Some orthochromatic films can be used under a Kodak series 1A safelight, but others require the darker Kodak series 2. Ilford makes an orthochromatic film in sheet sizes called Ilford Ortho. It is similar to FP4 except that it isn't sensitive to red. Macophot markets two types of othochromatic film: PO-100 which is a pictoral contrast film and ORT-25 which is sort of like an ortho version of Tech Pan. These are available in 120 as well as 35mm and sheet sizes. Kodak makes a slow colour-blind film called 5302 fine grain release positive in cine film sizes. If is designed for making B&W movie prints, but could be used in camera it has an EI of around 6 to sunlight. Peter. Signaturepirwin@ktb.net > There was once a film made by Kodak, black and white > which was not sensitive to red light, and could be as out > in the open and undeveloped under red light, Pan - > something I think ... anyone remember this? As pointed out already, that's orthochromatic film, a great advance over regular film, but hard to find these days as panchromatic film is so much better still for everyday photography. SignatureStefano http://www.steve-and-pattie.com/esperantujo "AArDvarK" <noway@yourprob.com> wrote in message news:<NXy5c.17191$Nj.3215@fed1read01>... > There was once a film made by Kodak, black and white > which was not sensitive to red light, and could be as out > in the open and undeveloped under red light, Pan - > something I think ... anyone remember this? There is 5302. "Fine Grain Release Positive" if I recall correctly. We used it for making negs of motion picture film. 35mm only. I'd love to find some in 120. :) why not the Ilford stuff? Alex > > There was once a film made by Kodak, black and white > > which was not sensitive to red light, and could be as out [quoted text clipped - 4 lines] > used it for making negs of motion picture film. 35mm only. I'd love to > find some in 120. :) > why not the Ilford stuff? > Alex Yes, it was still listed on their site as of yesterday. They advertised it as a superb copy film. I enjoy using ortho film as one can develop by inspection under red light. It also gives most landscapes a wonderfully softer intonation which I find harder to obtain with pan films using the modern super sharp and contrasty lenses of today. > > > There was once a film made by Kodak, black and white > > > which was not sensitive to red light, and could be as out [quoted text clipped - 4 lines] > > used it for making negs of motion picture film. 35mm only. I'd love to > > find some in 120. :) > There was once a film made by Kodak, black and white > which was not sensitive to red light, and could be as out [quoted text clipped - 6 lines] > > Alex You might be thinking of Verichrome Pan, the panchromatic version of the earlier Verichrome film. The original was not sensitive to red. But this film is long gone from Kodak. Regards, -Karl http://pages.cthome.net/karlwinkler Now that sounds realistic to me somehow. Absolutely everyone else has said 'Ortho' this or that. I have used this stuff long ago in high school but just do not rem- ember the Ortho name. Thanks, Alex > > There was once a film made by Kodak, black and white > > which was not sensitive to red light, and could be as out [quoted text clipped - 15 lines] > -Karl > http://pages.cthome.net/karlwinkler If you want an ortho film check out Macophot's offerings. They have a PO 100, which is ortho and a ORT 25. I personally don't like ortho film. I find using a green filter gets me better results. With respect to using any of these "ortho" films with a safelight, I'm told you can't as they still have a little sensitivity to red light. I asked this question on the darkroom group some time ago and was told that many people now use an infrared lamp with night vision goggles for development by inspection. I've never done this (my darkroom is a closet) but it sounds like it might work, just make sure your film doesn't have infrared sensitivity. > Now that sounds realistic to me somehow. Absolutely > everyone else has said 'Ortho' this or that. I have used [quoted text clipped - 24 lines] > > -Karl > > http://pages.cthome.net/karlwinkler |
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