B&W film developing questions
in [Darkroom]
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From: David Nebenzahl on 26 Jan 2008 15:18 On 1/26/2008 11:43 AM jjs spake thus: > Lawrence Akutagawa wrote: > >> [...] one of the most important items in the BW darkroom for both film >> developing and (especially) print processing is a good audio system. > > I have no audio equipment in the darkroom... except a metronome. :) Same here, minus the metronome. I don't find music to be a compelling need in the darkroom.
From: ____ on 26 Jan 2008 16:40 In article <9sKmj.9222$EZ3.3444(a)nlpi070.nbdc.sbc.com>, "Lawrence Akutagawa" <lakuNOSPAM(a)sbcglobal.net> wrote: > "Richard Knoppow" <dickburk(a)ix.netcom.com> wrote in message > news:13pmr0hb39kjtfa(a)corp.supernews.com... > > > > "Ken Hart" <kwhart1(a)verizon.net> wrote in message > > news:flv4uc$o33$1(a)aioe.org... > >> > >> "David Nebenzahl" <nobody(a)but.us.chickens> wrote in message > >> news:4782f423$0$16346$822641b3(a)news.adtechcomputers.com... > >>> On 1/7/2008 7:28 PM G.T. spake thus: > >>> > >>>> I forgot to ask one question. What is the effect of fixing for too > >>>> long? > >>> > >>> Image degradation, and in extreme cases, silver reduction and image > >>> "bleaching"--but you'd have to leave the film in for a very long time > >>> for this to happen. > >>> > >>> Don't sweat it. > >> > >> And that period of time would be measured with a calendar rather than > >> aclock! > > It depends on the fixer. Ammonium thiosulfate in acid is capable of > > bleaching metallic silver in a relatively short time. The problem exists > > mostly for the very fine grain silver of printing paper rather than film > > but fixing times should not be much extended beyond the time needed for > > complete fixing. The bleaching effect is why rapid fixer is diluted more > > for prints than film. > > The bleaching takes place only when the fixer is acid, neutral or > > alkaline rapid fixer does not bleach silver. > > A good mild reducer for removing dichroic fog from film can be made by > > adding about 15 grams per liter of citric acid to standard film strength > > rapid fixer. Dichroic fog is a deposit of very fine silver on the surface > > of the film. > > Citric acid, in this application, is a sequestering agent for the > > silver. > > While not exactly on topic as per Richard's post, allow me to point out as > per the main topic of B&W film developing that one of the most important > items in the BW darkroom for both film developing and (especially) print > processing is a good audio system. A plain radio is fine, but a tape deck, > a CD player, and especially a MP3 player (with its long play ability) is to > be recommended. For me at least, such a device makes those long and already > enjoyable darkroom sessions that much more enjoyable. You sound like John Douglas. -- Reality is a picture perfected and never looking back.
From: Richard Knoppow on 27 Jan 2008 11:44 "David Nebenzahl" <nobody(a)but.us.chickens> wrote in message news:479b9578$0$3617$822641b3(a)news.adtechcomputers.com... > On 1/26/2008 11:43 AM jjs spake thus: > >> Lawrence Akutagawa wrote: >> >>> [...] one of the most important items in the BW darkroom >>> for both film developing and (especially) print >>> processing is a good audio system. >> >> I have no audio equipment in the darkroom... except a >> metronome. :) > > Same here, minus the metronome. I don't find music to be a > compelling need in the darkroom. David, did you post a question to me about older Kodak enlarging lenses? If so I can't find it again. -- --- Richard Knoppow Los Angeles, CA, USA dickburk(a)ix.netcom.com
From: Henry(k) on 27 Jan 2008 11:57 Dnia Fri, 04 Jan 2008 22:04:55 -0800, G.T. napisa�(a): > . The Rodinal says undiluted it will last 6 months. Can I be safe to > assume it will last that long? Last week I made test - bottle of Rodinal used last time 5 years ago (so it has 6 or 7 years). 1+25 - still works without any problem. I tested also D-76 1+1 mixed in Sept 2006 - works not so good, but it's still ok - without direct comparison no visible difference. And never ask such questions - shot a few test frames, cut film and develop it. It costs a few cents, but can save your negative if something will go wrong with developer after wrong storage. > Can I develop more than one roll of film in my Rodinal? In low dilutions yes - but I don't recommend it. > 2. The stop is the least of my worries, right? It should be ok for a > couple dozen rolls over the next couple of months? After Rodinal don't use acid stop bath - plain water works ok - I use 3 water changes in 2 min. Greetings Henry
From: Pieter on 27 Jan 2008 14:39
I have an old "boom box" with tape player - preceded CDs. I put a layer of duct tape over the pilot lights so they are very very dim. No problems with light. I find that listening to music helps me relax and avoid the temptation to rush the timer on the chemistry. Metronomes are handy for counting intervals, but I mostly use digital "egg timers" from WalMart for timing stuff in the darkroom. The gentle beep can barely be heard over the boom box at modest levels. "Richard Knoppow" <dickburk(a)ix.netcom.com> wrote in message news:13ppd8h46080799(a)corp.supernews.com... > > "David Nebenzahl" <nobody(a)but.us.chickens> wrote in message > news:479b9578$0$3617$822641b3(a)news.adtechcomputers.com... >> On 1/26/2008 11:43 AM jjs spake thus: >> >>> Lawrence Akutagawa wrote: >>> >>>> [...] one of the most important items in the BW darkroom for both film >>>> developing and (especially) print processing is a good audio system. >>> >>> I have no audio equipment in the darkroom... except a metronome. :) >> >> Same here, minus the metronome. I don't find music to be a compelling >> need in the darkroom. > > David, did you post a question to me about older Kodak enlarging > lenses? If so I can't find it again. > > > -- > --- > Richard Knoppow > Los Angeles, CA, USA > dickburk(a)ix.netcom.com > |