From: Clay Harmon (wcharmon@wt.net)
Date: 11/12/02-09:06:44 PM Z
Jeff:
What are you using for your light source? And how are you timing it or
measuring it. I find I get pretty consistent results with the same
materials and ambient conditions... But I'm using a Nuarc most of the
time.
Clay
On Tuesday, November 12, 2002, at 08:58 PM, Jeff Buck wrote:
> Actually, it's the tendency of a phenomenon to recur in the same
> form.... Anyway, after doing platinum/palladium for about fifteen
> months now, I find if very difficult to achieve. I arrive at a print
> that is satisfying. I want to repeat it. So, I use the same paper,
> the same chemicals (plain FO, pure palladium, PO w/ sodium dicromate
> mostly), the same exposure, and the same developer. As for ambient
> temperature and humidity, I can get pretty close to repeating,
> especially this time of year when I'm producing both artificially (by
> and large). Like the last couple days, I'm printing this negative,
> and the temp is between 65F and 70F, the humidity is in the range of
> 60% to 70%. In each instance, the paper has been laying out in the
> area of that temp and humidity for a few hours; it's a little "heavy"
> and tacky to the touch. I guess I made four prints in these
> conditions (I was double-coating Platine, if that makes any
> difference). There were notable differences in the overall darkness
> of the prints and in degree of contrast. Would you expect discernible
> differences working within these variations in temp and humidity? How
> do you measure the temperature of the FO and platinum or palladium?
> I'm squeamish, maybe for no reason, about putting a thermometer into a
> bottle of precious metal....
>
>
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