> > 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 > -----Original Message----- > From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of > m.9.wil...@ntlworld.com > Sent: Wednesday, 24 December 2008 9:20 PM > To: Pentax-Discuss Mail List > Subject: Re: Another Casualty. > > > ---- John Sessoms <jsessoms...@nc.rr.com> 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 > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
