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Masking w/ heat-developed film
Hi All
Recently I've noticed a few posts about Masking & Masking w/ Kodalith. I seem to remember reading about Masking w/ heat-developed film. This media was very fast to develop, didn't require drying, and seemed like the way to go. Is it still available? Does anyone use it? Are there any huge drawbacks to it? Or perhaps, better yet, lacking answers to the above, could anyone direct me to an on or off line reference? I spent ~ an hour Googling & didn't find anything Thanks John |
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"John McGraw" wrote
I seem to remember reading about Masking w/ heat-developed film. Look for 3M 'thermal copier' film. I would have thought this stuff had died 20 years ago, but it seems it's still going. You will need an intense IR source to get it to work. But you may be able to pick up an old 3M thermal copier for a few $$. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. Remove spaces etc. to reply: n o lindan at net com dot com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
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"John McGraw" wrote
I seem to remember reading about Masking w/ heat-developed film. Look for 3M 'thermal copier' film. I would have thought this stuff had died 20 years ago, but it seems it's still going. You will need an intense IR source to get it to work. But you may be able to pick up an old 3M thermal copier for a few $$. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. Remove spaces etc. to reply: n o lindan at net com dot com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
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"Nicholas O. Lindan" wrote in message nk.net...
"John McGraw" wrote I seem to remember reading about Masking w/ heat-developed fil Look for 3M 'thermal copier' film. I would have thought this stuff had died 20 years ago, but it seems it's still going. Thanks, Nicholas for the 411. Why do you say:...."thought this stuff had died 20 years ago"? What's the problem w/ it, used as masking film? It was probably10 or 20 years ago that I heard about this You will need an intense IR source to get it to work. But you may be able to pick up an old 3M thermal copier for a few $$. Can you elaborate on this a ‘liddle mo'? By "old 3M thermal copier" do you mean like one of those awful thermal fax machines that stunk & the copies turn brown? Is this inferior to Kodalith, or other masking methods, I don't know about? Do, or have you used any masking methods? If so can you impart any further insight? My main interest is color transparency contrast reduction. My thought is if this stuff works {gives fine density control & quality (no obvious artifacts)}, it would be much better that having to take the time to wet develop & dry the masking film. Thanks so much for your time, John |
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"John McGraw" wrote
Is this inferior to Kodalith, or other masking methods, I don't know about? Do, or have you used any masking methods? If so can you impart any further insight? My main interest is color transparency contrast reduction. Then Kodalith is the wrong stuff: it is made for lithography - either clear or black. You can try and get a grey out of it, but that's not what it's made for. Thermal copier film is the same way: it turns black or it doesn't. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. Remove spaces etc. to reply: n o lindan at net com dot com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
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"John McGraw" wrote in message
m... Hi All Recently I've noticed a few posts about Masking & Masking w/ Kodalith. I seem to remember reading about Masking w/ heat-developed film. This media was very fast to develop, didn't require drying, and seemed like the way to go. Is it still available? Does anyone use it? Are there any huge drawbacks to it? Or perhaps, better yet, lacking answers to the above, could anyone direct me to an on or off line reference? I spent ~ an hour Googling & didn't find anything Thanks John Hi John, Can't help you with the heat-developed film but for classic silver masking, here are a few links: http://www.bonavolta.ch/hobby/en/photo/masking101.htm http://www.largeformatphotography.info/unsharp/ http://www.radekaphotography.com Ctein book "Post Exposure" (ISBN 0-240-80299-3, but a new edition seems to be available) has also a chapter about masking. And finally an under construction page (in french, but you may translate it using google language tools): http://www.bonavolta.ch/hobby/fr/photo/mask.htm This one is more aimed at 35mm. Just hope to finish it one day ... Lith film is sometimes used to preserve the extreme highlights. A first high-contrast mask is done where only the specular highlights appear (completely black), this mask isapplied onto the slide and then the final contrast reducing mask is done. There are several other masks types, including some for color correction. Masking can of course be used for B/W but, as we already have several other tools to modify contrast, it is less used. Regards, -- Claudio Bonavolta http://www.bonavolta.ch |
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"John McGraw" wrote in message
m... Hi All Recently I've noticed a few posts about Masking & Masking w/ Kodalith. I seem to remember reading about Masking w/ heat-developed film. This media was very fast to develop, didn't require drying, and seemed like the way to go. Is it still available? Does anyone use it? Are there any huge drawbacks to it? Or perhaps, better yet, lacking answers to the above, could anyone direct me to an on or off line reference? I spent ~ an hour Googling & didn't find anything Thanks John Hi John, Can't help you with the heat-developed film but for classic silver masking, here are a few links: http://www.bonavolta.ch/hobby/en/photo/masking101.htm http://www.largeformatphotography.info/unsharp/ http://www.radekaphotography.com Ctein book "Post Exposure" (ISBN 0-240-80299-3, but a new edition seems to be available) has also a chapter about masking. And finally an under construction page (in french, but you may translate it using google language tools): http://www.bonavolta.ch/hobby/fr/photo/mask.htm This one is more aimed at 35mm. Just hope to finish it one day ... Lith film is sometimes used to preserve the extreme highlights. A first high-contrast mask is done where only the specular highlights appear (completely black), this mask isapplied onto the slide and then the final contrast reducing mask is done. There are several other masks types, including some for color correction. Masking can of course be used for B/W but, as we already have several other tools to modify contrast, it is less used. Regards, -- Claudio Bonavolta http://www.bonavolta.ch |
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