Developer also plays an effect in the final tones. Ethol LPD produced colder chocolate when used more concentrate, have not tried it with Dektol. C.Breukel@xxxxxxx wrote: FYI About 2 weeks ago I posted below message: I tried to obtain cold sepia tones with a developer with hughe amounts of potassium bromide (KBr). Mistakenly I tried it with cold tone paper (Ilford MG IV). I repeated the experiment with Ilford MG WT FB paper, and toned with a direct sepia toner (poly sulphide toner, Kodak T-8). Standard developer: chocolate/warm brown Developer plus 25 g/l KBr: still quite brown Developer plus 50 g/l KBr: quite neutral perhaps a hint of cold sepia Developer plus 75 g/l KBr: quite neutral perhaps a hint of cold sepia So in principle Ira Currents observation seems to hold true for modern warm tone papers as well. There is about a 1-1½ stop loss in speed with increasing KBR, the development time was not longer unlike the description in the paptent. This was a quick experiment, I guess the concentration of KBr needs carefull dailing in. I do not see direct use, unless you want to protectivly tone with polysulphide WT paper without a colour shift, Best, Cor > -----Original Message----- > From: Breukel, C. (HG) > Sent: maandag 5 november 2007 14:13 > To: 'pure-silver@xxxxxxxxxxxxx' > Subject: Sepia toning & Potassium Bromide & Ira B Current > > > FYI > > Some weeks ago Richard posted below comment on the list: > > >>>>>>>>>>>>>>>>>>> > A curiousity pointed out to me by Ryuji Suzuki is a > patent issued to Ira Current of Ansco for warm tone > developer USP 2,607,686. Current found that adding very > large amounts of Bromide to an active developer made sepia > toned prints cold sepia. This might be worth a try. One of > the developer formulas in the patent is essentially the same > as Dektol. Current added from 20 to 80 grams of Potassium > Bromide to this. From the patent data the development time > will be much increased, perhaps 8 minutes. See the patent > for more data. Most of the literature will lead you to > believe that adding Bromide will result in yellower tones > from sulfiding toners. According to this patent this is not > true _if enough bromide is added_. > >>>> > > > I picked up the patent, and got the impression (perhaps wrongly) that when > you would use one of the described developers with increasing (big > amounts) of KBr one could obtain warmtone/spia tones out of a regulair > cold tone paper. > > I tried on Ilford MG IV RC with below developer: > > Metol 5 gr > Sodium sulfite 40 gr > HQ 6 gr > Sodium carbonate 50gr > > In 1 liter, with increasing amounts of Kbr from 25, 45 to 64 grams per > liter. > > Therewas no change in image tone, nor were the developing times longer > than normal. > > Re-reading the patent I think it was more wishfull thinking on my side. > Maybe I'll re-try on Kentmere Kentona, and than tone with a polysulphide > toner afterwards, > > Best, > > Cor ============================================================================================================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. --------------------------------- Get easy, one-click access to your favorites. Make Yahoo! your homepage.