Bogdan, Try washing the print in an acid bath; non indicator stop bath would be fine. You may have a precipitate that has formed and dried into the surface. Then rewash your print and you may even use a weak carbonate bath to balance out the acid. Eric Neilsen Photography 4101 Commerce Street Suite 9 Dallas, TX 75226 http://e.neilsen.home.att.net http://ericneilsenphotography.com Skype ejprinter > -----Original Message----- > From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver- > bounce@xxxxxxxxxxxxx] On Behalf Of Bogdan Karasek > Sent: Tuesday, April 03, 2007 8:10 PM > To: pure-silver@xxxxxxxxxxxxx > Subject: [pure-silver] Re: Cleaning a Drum Dryer > > Hi, > > When I was doing the sepia toning, it was written on the instructions > that a hardener should be used after toning because the bleaching > process renders the paper soft. Do they mean that the bleach "eats" > away the protective layer of gelatin coating in order to get at the > emulsion????? > > I did not use a hardener and noticed that on several of my prints, there > were motes of dust imbedded in the paper. I took one print and tried > to rub off the dust but to no avail. That's when I realized that it was > imbedded in the paper, but which layer, emulsion layer or was there > still some gelatin left, despite the bleaching? > > Cheers, > Bogdan > > Richard Knoppow wrote: > > snip > > > > The Baryta layer _is_ a coating of gelatin. It is the sizing for the > > paper. Most papers have more than one layer but the number of layers > > also has to do with what sort of texture the paper is to have. Note that > > there is a difference between texture and surface: texture is gotten by > > callendering the paper before the emulsion is coated and texture is > > usually from something in the overcoating (like talc). > > Generally fiber paper has three basic coatings: the baryta layer, the > > emulsion coated over this, and a protective layer of gelatin coated over > > the emulsion. This protective layer is what is used to obtain the very > > smooth surface when ferrotyping. > > Dave Valvo, who is on this list, is a former Kodak paper expert and > > can unboubtedly provide more complete information. > > > > --- > > Richard Knoppow > > Los Angeles, CA, USA > > dickburk@xxxxxxxxxxxxx > > > > > > > ========================================================================== > =================================== > > > > 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. > > > > > > -- > ________________________________________________________________ > Bogdan Karasek > Montréal, Québec bogdan@xxxxxxxxxxxxxxx > Canada www.bogdanphoto.com > > "I photograph my reality" > ________________________________________________________________ > > > ========================================================================== > =================================== > 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. ============================================================================================================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.