Re: Iron Processes with Dichromate - calibrating curves

OK, thanks for the information Sandy. I think you have given this to me
before, but it gets interesting when trying to calibrate a curve. i.e.
beginning with fresh developer with 1 ml of 5% dichromate/liter will yield a
different result than a 'seasoned' developer that's been replenished with
only 100 ml of fresh dev. containing dichromate. Calibrating a curve will
require already having an equilibrium established between exhausted/fresh
developer.... or else it's meaningless.

Michael Klemmer

----- Original Message -----
From: <sanking@CLEMSON.EDU>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, January 09, 2005 6:22 PM
Subject: Re: Iron Processes with Dichromate - calibrating curves

> Sorry about the multiple messages on this. My impression is that the p
> dichromate is consumned at a slightly faster rate than the developer so I
> have established a standard rate of replenishment, for both kallitpe and
> pallaidum, that consists of about 100ml of new developer (with the right
> amount of dichromate added) for every 200 square inches of print surface
> developed. If you start to see any fog increase the rate to 100ml per
> every 100 square inches.
>
> Sandy
>
>
>
> > Shall I assume that K Dichromate is being consumed in the process at
> > roughly the same rate that as the replenishment with fresh developer?
So
> > therefore I should begin with developer that has no dichromate, but with
a
> > starting replenish charge of developer contining the K Dichromate?
> >
> > Michael Klemmer
> >
>
Received on Sun Jan 9 22:49:44 2005