[pure-silver] Re: KRST
----- Original Message ----- From: "Bill Stephenson" <photographica@xxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, August 24, 2007 12:00 AM
Subject: [pure-silver] Re: KRST
Back in the 60's, the portrait studio (chain) lab where I worked used KBT and KRST mixed together (unfortunately, I don't recall proportions) for warm reddish-brown medium tones and colder shadows. As I recall, this was used only with Kodak's Ektalure paper, which was fairly warm to begin with. 

-Bill
This was a predecessor to Kodak Polytoner. I have two versions of the formula: One is from a Kodak handbook , uses Kodalk, and gives two variations for different colors, the other came from a magazine and uses Carbonate. I have tested the latter. It works but is very much faster than either toner alone, producing full toning in under three minutes at room temperature. I am pretty sure I have posted all this stuff to this list in the past. It should be in the archives. If not, and if anyone is interested, I will post it all again. 

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