---- Anthony Farr <[email protected]> wrote: > > > > There was also the pre-Powerpoint blueprint film, whose name I forget. > > > > That'll be dyeline paper, a diazo process. Ilfochrome / Cibachrome also > used azo dyes, which are dyes that whose chemical bonds somehow break down > when exposed to strong or UV light, leaving the unexposed part to be > developed to an autopositive image (same ultimate result as reversal but a > different chemical process). Dyeline paper is developed in ammonia fumes. > If you handle any freshly developed dyeline paper you MUST NOT handle any > other film or photographic paper until you've thoroughly washed your hands, > because ammonia will completely fog them, whether they're exposed or not. > > regards, Anthony
Sorry, not being clear. There was a Polaroid 35mm film that output similar images to cyanotpye. White image on a blue background. It was used to produce slides of writing for use in AV presentations. It was terrifyingly expensive and, before the days of TTL flash, you had to sacrifice a film in testing to obtin correct exposure. > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On Behalf Of > > [email protected] > > Sent: Wednesday, 24 December 2008 9:20 PM > > To: Pentax-Discuss Mail List > > Subject: Re: Another Casualty. > > > > > > ---- John Sessoms <[email protected]> wrote: > > > From: John Francis > > > > I believe there was also Polaroid-branded 35mm roll film. > > > > > > They developed and marketed a 35mm instant film that didn't do very well > > > in the market. IIRC, it was transparency film available in both color > > > and B&W versions. > > > > > > Later they offered Polaroid brand C-41 process 35mm film, and may have > > > offered an E6 35mm film as well. > > > > > > I'm sure about the C-41 version because I have a roll in the freezer; > > > not so sure about the E6. > > > > There was also the pre-Powerpoint blueprint film, whose name I forget. > All of the > > Polaroid 35mm stuff was self (and dry) process, to give you the quickest > result. > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow > > the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
