[pure-silver] Re: Selenium toning inconsistancy

  • From: daniel <daniel.bouzard@xxxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Sun, 25 Jul 2010 09:03:34 +0200

Hello,
I usually used for subbtle tonings a very diluted combination of Viradon ( "new") and sélénium with sodium hydroxyde as base. I have found that sodium carbonate is not an enough strong base and cause staining in some case. The print is put in the diluted solution for 1 or several minutes and then washed with running hot water at 40-45°C. This can be repeated until the wanted effect. Doing this it is possible to get subtle colour in the hight lights and increased contrast in the blacks. It is more pronounced with warm papers. 

Richard Knoppow a écrit :



----- Original Message ----- From: "Dennis P" <dlp4777@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, July 20, 2010 8:04 AM
Subject: [pure-silver] Selenium toning inconsistancy
I am working on a project of printing a client's negs for him and he wants the prints to be warm tone fiber paper that is toned to the reddish brown totally toned color. I showed him work I have on hand that I have toned that way using Ilford WT FB and he likes that color. I them made some prints for him on the Ilford WT FB paper and toned them and they came out a slightly different color. They are close but the older prints are browner and warmer and the new prints are a bit colder and less intense in color. I am not sure what the variables might be for my adjusting that. Does anyone out there have a good handle on what makes changes in the final color? 
Developer changes?   Dilution, composition?
Selenium differences?  Age, dilution, exhaustion?
Paper differences?  same paper but different batch?

thanks for anything you might know about it.
Dennis Purdy
Something else that occured to me is that you might get good results by using a combination toner. This is a combination of a selenium and polysulfide toner. Kodak used to put it up as Polytoner and Agfa as Viradon. Kodak discontinued Polytoner some years ago and Agfa changed Viradon to a pure polysulfide toner. However, you can make your own from Kodak Rapid Selenium Toner and Kodak Brown Toner plus some sodium carbonate. The resulting toner makes a reddish brown color and is very rapid unlike its components. I found a couple of variations of it and will post them if you like. I've tried it and it works. As with KBT you must use a sulfite clearing bath after toning. For one thing polysulfide continues to tone until washed out. If it isn't washed out fairly rapidly it will cause staining. Polysulfide has the peculiar property of toning faster as it becomes diluted or exhausted but can cause stains. The clearing bath can be Kodak Hypo Clearing Agent. While the recommendation is for a fairly strong bath I've found the KHCA at normal working dilution work fine. The prints are treated in this until the orange stain goes away and then washed. Since the image is composed of sulfide and selenide it should be quite permanent. 

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