Archived posting to the Leica Users Group, 2001/10/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]- ----- Original Message ----- From: "Rei Shinozuka" <shino@ubspainewebber.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Wednesday, October 03, 2001 2:52 AM Subject: Re: [Leica] Re: Xtol newbie >> From: Guy Bennett <gbennett@lainet.com> >> >> According to Anchell and Troop, "dilution increases speed and sharpness >> with XTOL. Dilutions of 1:3 or more are frequently recommended. At these >> dilutions XTOL is effectively a nonsolvent developer, but because of its >> careful buffering, grain is still fine." (Film Developing Cookbook, p. 50) >> >> So with XTOL in dilutions of at least 1:3, you get both the fine grain of a >> solvent developer *and* the sharpness of a non-solvent developer, something >> that has been remarked by a number of folks on this list. And as for not >> having enough developer at dilutions greater than 1:1, I don't believe it. >i guess you are referring to the kodak-recommended "100 ml rule": > >From Kodak J109: > > We recommend always starting with at least 100 mL (3.5 fluidounces) of > full-strength developer to prepare the diluted solution for each 135-36 or > 120 roll (or the equivalent of 80 square inches [516 square centimetres]). > >in practical terms, this would imply that with a dilution of 1+3, you would >need 100x4=400ml of diluted solution per roll. this is roughly equivalent >to one reel in a 2-reel (16 oz) tank full of 1+3 XTOL. > > > >> While there is much to be said for following manufacturers' instructions, >> personal experience suggests that it is simply not true. (Like having to >> mix XTOL at 20° when other temps will also work.) Why not try it yourself >> and compare? >> >> Guy >i do often break the 100ml rule. does the 100ml rule have safety factors >built-in, like making sure it will work with 1-year-old developer made >with rusty tapwater, developing muddy-dense negatives, etc? with fresh xtol >made with distilled water, can we get down to 70-75 ml per roll? >do others break the 100 ml rule? >-rei I have broken the 100 ml rule with TriX and TMax100 and the results are fine. Xtol dilution was 1:3. Actual developer amount was 65ml : 195ml which gave a total of 260ml of solution. I tried this on Neopan 400 but had inconsistent results. On certain occassions the roll came out thin. Processing was done using a CPE2+ at 25 deg C. Jobo's website has an article about this and they had similar findings using Neopan when less than 100ml of stock was used. I would like to hear from others who has tried Neopan 400 using less than 100ml of Xtol stock at 1:3. - -guna - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html