Archived posting to the Leica Users Group, 2012/09/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I used to hand coat buffered rag paper with silver gelatin emulsion. I needed to use fresh developer and fix for each print, but the results were nice. I have fibre base prints that have been processed for optimum stability that are now showing all sorts of odd artefacts after 10-20 years of storage. I suspect the air where I live isn't as nice as it seems. Marty On Tue, Sep 4, 2012 at 9:59 AM, Paul Roark <roark.paul at gmail.com> wrote: > Mark Rabiner <mark at rabinergroup.com> wrote: >> ... >> It was brought to my attention that there never was a darkroom paper that >> was 100% rag. ... > > This is getting a bit OT, and I apologize for that. > > The situation with the wet darkroom paper is worse than it not being > rag. Good alpha cellulose, which most good wet darkroom paper was, is > very nearly as good as rag. The real problem was that it could not be > buffered due to the acidic chemicals used. As such, our silver prints > are being attacked by air-borne acids. I have seen in my own metal > cabinet yellowing after 20 years of storage. The good inkjet > cellulose (rag or alpha), not having to withstand the development > chemicals, are buffered and should resist the acids much better. > > Paul > www.PaulRoark.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information