Archived posting to the Leica Users Group, 2002/03/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have never used stop bath for negs since Schwalberg, Mike Tatem ,and the other "thin-film" gurus of the 50's suggested the acid might react creating bubbles thus damaging the film. I use distilled water for the developer, water rinse before fixing, distilled water to mix fixer, distilled water to wash film (use the Ilford three-bath procedure, and distilled water with anti-static rinse. Dry in air filtered cabinet at room temperature. Result is very little chance for pin holes or foreign matter on the negs. - ----- Original Message ----- From: "Roland Smith" <roland@dnai.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Monday, March 25, 2002 10:59 PM Subject: Re: [Leica] Re: Darkroom Question > I wondered if others used water instead of stop bath for film. I have been > doing that since the middle 1950s. > > I do use stop bath for prints. Is this really necessary? > > Roland Smith > Oakland, California > ----- Original Message ----- > From: "Jim Brick" <jim@brick.org> > To: <leica-users@mejac.palo-alto.ca.us> > Sent: Monday, March 25, 2002 9:24 AM > Subject: [Leica] Re: Darkroom Question > > > > At 09:04 AM 3/25/2002 -0600, Bill Satterfield wrote: > > >Was in the darkroom over the weekend developing film. I use a tank. On > > >one batch, I used a ounce of short stop to 15 1/2 ounces of water > rather > > >than a 1/2 ounce. Film looks OK. What harm did I do and what can I > > >expect?. A mental error caused by waiting to long to develop rolls of > > >film. Perhaps, I ought to develop more frequently. Thanks > > > > > > Actually, no harm. I have never used a stop bath in film processing in my > > 50 years of darkroom work. It is unnecessary. But too much stop won't > > bother anything anyway unless you are using a developer containing > > carbonate. Which there are none of nowadays. > > > > Hydroxide will evolve CO2 but Rodinal is about the only normal contrast > > developer containing it. But I have never known anyone to have stop bath > > problems, regardless of concentration. > > > > When I started darkroom work in the 50's, there were carbonate containing > > developers being used and stop bath had the possibility of causing "pin > > holes" which is gas forming within the emulsion, rapidly being released, > > causing an eruption thus a pin hole. Because of this, I was taught (Brooks > > Institute of Photography) to simply use water as a rinse between the > > developer and fix with film. It has served me well for all of these years. > > > > Jim > > > > -- > > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > > > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html