[pure-silver] Re: Cleaning Drying Screens

  • From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
  • To: <pure-silver@xxxxxxxxxxxxx>
  • Date: Mon, 20 Jun 2005 16:51:45 -0700


----- Original Message ----- From: "Lee Carmichael" <click76112@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, June 20, 2005 3:53 PM
Subject: [pure-silver] Re: Cleaning Drying Screens



"Its probably good practice to rinse the screens in warm water occasionally or to spong them off wtih water with some dishwashing detergent in it and then rinse. IMO if you are drying with the base side against the screens this is a non-problem."

or you could just not use this stuff.

lee\c

Sistan is about the only stabilizing agent available in the US. Fuji makes something called Ag-Guard but it doesn't seem to be sold outside of Japan. Sistan has the advantage of providing considerable protection to the silver image without the changes in density or image color typical of toning. While some papers will tone sufficiently with a Polylsulfide toner to provide protection without a signifcant change in image character many will not. Especially for display prints, which are subjected to the polutants in open air, some sort of image protection is necessary. The best is probably a treatment in something like Kodak Brown Toner, Kodak T-8 toner, or Agfa Viradon sufficient to cause some visible change. Treatment with such a toner provides very considerable protection, but as indicated, may cause noticable change in color or density or both.
Polysulfide toner has the advantage over most other toners that it tones evenly so that partial toning is effective in protecting all densities. Most sulfiding toners split tone. If fully toned images are acceptable or desirable any sulfiding toner will proved very permanent images. Polysulfide is currently the only one that will give protection for only partial toning. Sistan is probably not as effective is toning but is much better than the raw image, and, again, doesn't change the appearance of the image.


---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx


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