[pure-silver] Combination Toner Test
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: "Pure-Silver Free" <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 30 Jul 2005 01:55:01 -0700
Some time ago I posted a formula for a combination toner
supposed to be similar to the late, lamented, Kodak
Polytoner. At that time one of the members of this list
reported trying this and that it didn't work. I mixed some
tonight and had success in toning a couple of different
kinds of paper. On possibility is that the other person used
new KRST and new KBT, my test was made with freshly bought
KBT but my KRST was bought in bulk about ten years ago.
Here is the formula I used:
Combination Selenium and Polysulfide Toner
Water 500.0 ml
Kodak Brown Toner 320.0 ml
Kodak Selenium Toner 80.0 ml
Sodium Carbonate 160.0 ml
Water to make 1.0 liter
Dilute 1 part stock to 3 parts water for use.
The hydration of the carbonate was not specified in the
orginal article with the formula, I used monohydrated
carbonate because that's what I have.
This toner works very quickly, a noticable change in color
appearing in one minute. Full toning appears to take place
in about three minutes. I extended toning on one print to 7
minutes but there was no visible change after about 3
minutes.
I toned three prints, two on Agfa Multicontrast and one
print on old Kodak Polycontrast. The Polycontrast print
toned only a little to a purple color, the Agfa toned
strongly to a purplish brown. These were normally processed
RC prints, I soaked each about one minute before toning.
There was no indicating of staining or other problems.
BTW, the Kodak Brown Toner was bought from Freestyle
earlier this week. It was dark brown and so was the toner in
all the bottles on the shelf. I haven't bought any KBT for
years, my memory is that the last stuff I got was clear. Has
anyone else gotten any recently? Whatever the color the
stuff seems to work OK.
The formula above is from:
_Modern Photography_ Dec, 1953, p.87 Attributed to Kodak.
I would like to hear from anyone else who tries it.
BTW, I mixed enough for only 200 ml working solution for the
test.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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