Archived posting to the Leica Users Group, 1999/02/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Bryan- I would be interested in hearing more on this article. I have heard of ammonia fuming of film, and that the process was started by astronomers desiring more speed and reduced 'reciprocity failure' in long exposures of starfields. I had tried it and flashing in my early years, but only had noticible success with flashing. Let us hear more... Dan - -----Original Message----- From: Bryan Caldwell <bcaldwell@softcom.net> To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us> Date: Wednesday, February 17, 1999 9:00 PM Subject: Re: [Leica] Delta 3200 -Reply >There is an article describing the hydrogen peroxide fuming method in an old >issue of Darkroom Magazine. So, although I've never tried it, I can attest >to the fact that this is not a big leg pulling exercise. I know I saved the >issue so as soon as I have a chance I'll dig around and see if I can find >it. > >Bryan >-----Original Message----- >From: Gareth Jolly <gareth.jolly@minters.com.au> >To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us> >Date: Wednesday, February 17, 1999 2:06 PM >Subject: Re: [Leica] Delta 3200 -Reply > > >>There is a procedure described in 'The Darkroom Cookbook' for pushing >>Tri-X to 3200, while retaining shadow detail. From memory, it involves >>transferring the film to a new long tank containing a warmed hydrogen >>peroxide bath for a period. An empty spool or two at the bottom of the >>long tank keeps the film suspended above the bath, in the fumes of the >>hydrogen peroxide. >> >>I've have to admit I never tried it - although I'm planning to at some >point >>when I can work out the logistics. >> >>>>> Eric Welch <ewelch@ponyexpress.net> 18/February/1999 03:07am >>>>> >>At 04:43 PM 2/17/99 +0000, you wrote: >>>Pushing Tri-X or HP5+ to 1600 will give better results at half the cost >> >>Not correct if you're talking image quality will well processed P3200 or >>Delta. Tri-X pushed to 1600 is going to be missing major shadow detail >>that >>will be in the higher-speed films which are actually right on at around >>1200 to 1600 ISO. >> >>Eric Welch >>St. Joseph, MO >>http://www.ponyexpress.net/~ewelch >> >>I disagree with unanimity. >> >> > >