U of S | Mailing List Archive | alt-photo-process-l | RE: Selenium-toning Van Dyke Brown prints

RE: Selenium-toning Van Dyke Brown prints

Richard, I guess the subject line of the message confused you; because I
was actually replying Sam about gold/thiourea toning of Vandykes, not
Selenium toner (which was the originating subject).


-----Original Message-----
From: Richard Knoppow [mailto:dickburk@ix.netcom.com] 
Sent: 27 Eylül 2006 Çarşamba 04:00
To: alt-photo-process-l@usask.ca
Subject: Re: Selenium-toning Van Dyke Brown prints

    This is then the opposite of what it does to 
silver-gelatin. Selenium tends to tone the finest grains 
first. since they are the least sensitive they tend to be in 
the denser areas of the image so the shadows of a print tone 
before the highlights. This is supposed to be the problem 
with using Selenium to protect silver images. If toning 
progresses far enough it will tone everything but partial 
toning will tend to split tone to some degree.
    Has anyone tried a polysulfide toner, like Kodak Brown 
Toner, on van Dyke? On conventional silver emulsions KBT 
tones uniformly so it can be used for partial toning.
    It would be interesting to know what other toners for 
silver-gelatin will work on other processes, for instance, 
would Nelson's Gold work on van Dyke?

Richard Knoppow
Los Angeles, CA, USA

----- Original Message ----- 
From: "Loris Medici" <mail@loris.medici.name>
To: <alt-photo-process-l@usask.ca>
Sent: Tuesday, September 26, 2006 9:35 AM
Subject: RE: Selenium-toning Van Dyke Brown prints

I was told that it's not a proportional toner; it tones the 
shadows and the
highlights at the same rate/time. But you can see its effect 
a little bit
quicker in the highlights. Therefore if you use it diluted 
and/or watch very
closely and snatch on the right time, you may get a split 
tone effect.