[pure-silver] Re: warming toner


----- Original Message ----- From: "Eric Neilsen Photography" <eric@xxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Saturday, December 10, 2005 8:11 AM
Subject: [pure-silver] Re: warming toner


It doesn't hurt to cover tray when not in use. I use clear Plexiglas on
trays. Sometimes even when I have a print in the tray I'll cover it. This
would be true with warm baths for two reasons. It cuts down on evaporative
cooling and also contains the harmful odor somewhat. I also make sure these
trays are as close possible to my intake over the sink for the exhaust
system. After a toning session with particularly stinky stuff, I'll also
open the door to the outside world to allow for maximum air in take. It is
on the opposite side of the darkroom from the exhaust system so no
interaction between them.



As for heating solution, before I had my table top color processor, I used a
heating element with a rheostat. It would sit in one tub and I drilled holes
in another an circulated the water between them keeping the heating element
away from my tray. Glad those days are over. Now when I brown tone which is
not often, I just heat the water before adding the toner, and keep a bucket
of warm water using my aquarium heater.





Eric


KBT works at room temperature but takes about five times as long to tone. I've always used a two tray water bath arrangement because its simple but recognize that other ways are better. I have not tried putting a heating pad under the tray, that might work.
There might actually be an advantage to room temperature toning if you are toning for image protection rather than for color change because the amount of toning might be easier to control.
The combination KBT and KRST toner I posted the formula for gives full toning in 1 to 3 minutes, depending on the paper, at room temperature. However, it has a quite strong rotten egg odor. Of course, you can always tone outdoors (unless you live where icecicles form on your nose).

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

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