Hi! Amidol is my paper developer for the few graded papers that remain. I use the 'teaspoon' formula found in the cookbook and mix up half the amount for a printing session. The prints are all 5x7. It should last 4 to 6 hours if it's not to warm. Best, Rich On May 23, 2009 10:44 AM, "Jean-David Beyer" <jeandavid8@xxxxxxxxxxx> wrote: Jean-David Beyer wrote: > Bogdan Karasek wrote: > >> Hi all, >> >> Again,, a Thank You to all who responded to my query concerning AZO and >> fogging. Very helpful responses but which lead me to other questions >> concerning AMIDOL which was mentioned as THE developer for AZO. I've order >> a quantity of Amidol from my supplier and will be using the formula found on >> Michael A. Smith's web site. >> >> I've done some further research into the p[properties of Amidol which I >> have never used before. Looking through the "Darkroom CookBook", Anchell >> mentions, as have others on this group, that Amidol oxidizes easily and >> should be mixed just before usage. >> >> The question I have concerning AMIDOL regards the following from >> the"CookBook": "Oxidizes rapidly and keeps poorly" >> >> Can anybody quantify "rapidly" >> > > It may vary depending upon the formula you use. I use the following: > > Water around 100F 1300 ml > Sodium sulfite 50 gm > Citric acid crystal 8 gm > Benzotriazole 1% 50 ml (depends on the paper) > > When cool (room temperature) add > Amidol 17 gm > Water to 2000 ml. > Amidol is quite soluble and does not need to be dissolved in hot water. Hot > water only makes it oxidize faster. The citric acid is to make it last > longer. > > I find it lasts several hours -- perhaps three. After that, it may still be > good, but it gets dark and I worry about staining. > >> My usual darkroom work practice when using Dektol is to mix a 4 liter >> batch of 1:2 Dektol and that sits in a large tray for at least 8-10 hours as >> I print, after which I dump it when I am finished at the end of the day >> What about Amidol???? How long will that keep in an open tray before it >> oxidizes and I have to dump it.... 2 hours, 4 hours, 6 hours or what? Am I >> better off mixing a small batch, 1.5L and changing often, or will a 3L >> batch last longer???? >> > > I guess if you want to make a larger batch, mix up the other stuff in the > morning, and then divide it into two or three parts, adding the amidol just > before you use it. > >> From personal experience working with Amidol, can anybody quantify >> "oxidizes rapidly" >> >> When all is said and done, using papers such as Ilfobrom, Oriental > Seagull, Ilford Galerie, Kodak Elite, it is not worth the trouble and > expense of using Amidol. N.B.: I cannot say how it works on Azo paper and > would defer to the experts. > > -- .~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 13:40:01 up 59 days, 19:54, 3 users, load average: 4.02, 4.02, 4.04 ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.