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 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