John Rudiak (wizard@laplaza.org)
Sat, 05 Jun 1999 13:37:50 -0600
I have a few questions here,
Steve Shapiro wrote:
> Amidol is a staining developing agent that is more acidic and developes from
> the base of the emulsion rather than the top of the emulsion down as most
> do.
>
Can you substantiate this? This sounds like one of those false statements that
have become gospel without proof because they have been repeated so many times
by so many people because they "read it somewhere". I am referring specifically
to the "develops from the base up" statement. And when you say more acidic,
more acidic than what? Do you mean it functions atypically in an acidic
environment?
>
> In theory, and to many photographer's eye in practice, this renders a more
> complete development with great depth to the image. While some use this
> combination with PMK in their Jobo, it was mostly used successfully in tray
> development with big negatives.
>
> Amidol has a tendency to oxidise at it's own rate
What does this mean? I don't understand this.
> and with this temperment
> is not a good developing agent to use with reel or hangar developing
> methods. I attest to that latter method folly having stained some 4X5 negs
> using hangars to develop in amidol.
>
> I wish to caution you, when using pyrogalol (pyro) even in solution, it
> gives off an invisible gas that can get under your eyelids and severly
> damage your eyes and impare eyesight;
You need to elaborate on this some more. What is this "invisible gas" that
"gets under the eyelids" ???????????
> amidol when breathed into the lungs in
> the powder form can cause lung damage. It takes such little effort to be
> careful If your tendency is to mix chemicals carefully with your tongue
> between your lips, mouth open or if you're prone to agitate trays with your
> face close to the surface as in on a high counter top Don't bother with
> these chemicals. There's enough modern developers available. Edward Weston
> abandoned pryo and amidol for Edwal FG 7 and Selectol/Dektol during the last
> ten years of his photographing.
>
> S. Shapiro, Carmel, CA
> ----- Original Message -----
> From: Guy Glorieux <glorieux@pop.total.net>
> To: List Alt-Photo <alt-photo-process-l@skyway.usask.ca>
> Sent: Friday, June 04, 1999 9:41 AM
> Subject: What does amidol do?
I appreciate your clearing these up for me. Thanks.
John
http://www.johnrudiak.com
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