[pure-silver] Re: Toning Question
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 31 Oct 2005 14:40:27 -0800
----- Original Message -----
From: "Jeffrey Thorns" <puresilver@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, October 31, 2005 12:40 PM
Subject: [pure-silver] Re: Toning Question
So, how much do most people dilute KBT? I didn't see the
dilution listed on the bottle.
Normally 1:30. The toner works very slowly at room
temperature so its usually heated to 100F in a water bath.
While I have toned many prints in KBT without a post
toning sulfite bath with no difficulty from staining it is
still recommended. Agfa recommends a 10% sulfite bath. I've
used stock Kodak Hypo Claring Agent successfully but have
not tested if it works as well diluted.
Both New Viradon and KBT are polysulfide toners. These
have the peculiar propertly of toning faster as they are
diluted or exhausted. That's why they tend to continue
toning in the wash unless the wash is very fast. The sulfite
bath stops this after toning.
Polysulfide (liver of sulfur) toner is one of the few
that tones all densities evenly so it can be used for
partial toning without split tones and with uniform image
protection.
As a general rule single bath toners are cooler (bluer)
than bleach and redevelop types. The color of the toned
image will depend on the nature of the original image but,
again a rule of thumb only, the warmer the original image
the more yellow it will be after toning.
Bleach and redevelop toners are recommended for cold and
neutral tone papers which may not show much color change
with single bath toners. However, one must tone completely
in them. It _is_ possible to delibrately split tone by not
bleaching completely. The remaining silver can be toned with
a different toner if desired.
The best source of practical toning information is _The
Photographer's Master Printing Course_ by Tim Rudman. This
has a wealth of data in it.
The curious thing is that my preference for Justin's
photo would be blue toning, probably a Gold toner, which is
both archival and more subtle than Iron-Blue.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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