[pure-silver] Re: Fixing after indirect toning - a deeper question

  • From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
  • To: <pure-silver@xxxxxxxxxxxxx>
  • Date: Tue, 17 Jan 2006 14:07:14 -0800


----- Original Message ----- From: "Christopher Woodhouse" <chris.woodhouse@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, January 17, 2006 10:19 AM
Subject: [pure-silver] Re: Fixing after indirect toning - a deeper question


Further to yesterday's experiment I tested odorless sepia toner :

1) Overnight odorless toning of partially fixed RC print
2) 2,4, 8 and 10 minute odorless toning of fully washed and RC print
3) Overnight odorless toning of fully fixed and washed RC print

1) Overnight patch was slightly darker than 8 min patch on partially fixed
RC print
2) Even 'perfect' processed print showed some minor staining by odorless
toner after a few minutes toning.
3) Extended odorless toning of 'perfect' print showed slightly more staining

In all cases the toner left a slight stain. My guess is that the toner might
be actually staining the gelatine.

I think this may be the case with the odorless toner and also with sodium sulfide but I don't know the chemistry well enough to guess at what might be happening. Its possible there may be something beside silver halide that the toner may react with to leave a stain if given long enough.

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

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