[pure-silver] Re: Was Ilford -- Sulfide toners?


----- Original Message ----- From: "Eric Maquiling" <emaquiling@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, October 25, 2005 3:26 PM
Subject: [pure-silver] Was Ilford -- Sulfide toners?


On 10/26 00:30, DarkroomMagic wrote:
consider sulfide toners, instead? Both leave you with different image tones,

Sorry Ralph and Jim for hijacking the thread. But could you point me to some
information on sulfide toners? I've only started to make my own chemistry for
about a year now. I don't really know the difference between Selenium and
Sulfide toners. Perhaps you are correct about the AA influence. I wonder what
our friends in Europe and Asia use mostly?

--

Eric

First of all, I will check with Kodak Customer Service tomorrow and find out if they have discontinued KRST.
There are basically two types of sulfiding toners called Direct and Indirect. Direct toners are those where the print is toned directly in one bath. Indirect toners are those where the print is bleached in a rehalogenating bleach first and then redeveloped in the toning bath.
The easiest toner to use is Kodak Brown Toner (or Agfa New Viradon). This is a direct toner that comes as a liquid concentrate. The paper is simply bathed in the working solution. Toning is very slow at room temperature so usually the toner soluion is heated to 100F. Brown toner is of a type which tones all densities uniformly so it can be used for image protection by toning only slightly. Current Viradon is very similar. There are other direct toners but they must be mixed from scratch.
Kodak still makes an indirect toner, Kodak Sepia Toner and Kodak Sepia Toner II. The type II has a more powerful bleach. Some modern VC papers do not bleach will in the standard bleach. The paper is bleached out in the bleaching bath, given a short wash and redeveloped in the second solution which is Sodium Sulfide. While split toning can be achieved by less than complete bleaching the unbleached silver particals are probably not protected. Indirect toner works best on neutral or cold tone paper. On warm tone paper it tends to be too yellow. Direct toners are usually colder in tone to they work well on warm tone paper.
There are dozens of toner formulas, for the most part they are not hard to make from scratch. KBT is used as a protectant for microfilm and is readily available.

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

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