Archived posting to the Leica Users Group, 1999/08/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dan Post wrote: > > MArk- > I like a little B&B in my coffee.... er, Oh! Wrong stuff, sorry! > Seriously folks, can you still get benzotriazole through the Kodak dealer, > or do you have to rely on mail order now? > I've used potassium bromide in film developers, particularly high contrast > and a hign temperature tropical developers, and in D-72 paper developer, I > think- been a while since I mixed any. > is there a synergistic effect when combined with benzotriazole that gives > this 'toned' effect, and what might cause it? > Dan > ----- Original Message ----- > From: Mark Rabiner <mrabiner@concentric.net> > To: <leica-users@mejac.palo-alto.ca.us> > Sent: Tuesday, August 10, 1999 2:10 AM > Subject: Re: [Leica] B&B > > > Michael Leitheiser wrote: > > > > > > I applied some internally and while my perspective may have changed, my > > > work looked the same. > > > > > > If I do it Marks way, should it be applied to the stock Dektol or the > > > diluted working solution? > > > Mike Leitheiser > > > > > Bread and Breakfast? > > Mark Rabiner http://www.photoformulary.com/ I have gotten it from the above in The Photographers Formulary P.O. Box 950 Condon, MT 59826-0950 I might have been their first customer in '76. "Synergistic" in some sense, not certainly "superadditive". Bromide cleans up a print but warms it and adds some green. That is the restrainer that is usually already in there. Benzotriazole takes the green out and cools it. Toning for Archival with Selenium is mainly an act of getting the green out. (Maybe we like the purple in the darks.) So I say B&B is like toning because it gets the green out. Or more precisely never puts the green in in the first place. Mark Rabiner (I make a bigger effert to keep Benzotriazole off my skin than most darkroom chemicals. Perhaps from experience)