Archived posting to the Leica Users Group, 2000/09/01

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Subject: Re: [Leica] Wet and Digital Darkroom Questions - Pt/Pd Printing, et.al.
From: George Lottermoser <imagist@concentric.net>
Date: Fri, 1 Sep 2000 16:56:27 -0500
 
wgower@eco-tec.com (William Gower)9/1/0011:47 AM

> Who on the list can point me to resources or share experiences
regarding
> water chemistry and developers ? I read (somewhere) that DI
(De-ionized or
> De-mineralized) water is not recommended for mixing developers.
Apparently,
> a certain concentration of metal cations and anions is required
for optimum
> development.
> 
> Is there an optimum concentration (TDS) where this occurs ?

I have the US Navy specs for water used in photography. If you
have a fax number, and interested, I can fax it to you next week
(after the holiday).

George