July 2005 Alt-Photo-Process-L: Re: APIS, hydroquinone hardening

From: Richard Knoppow ^lt;dickburk@ix.netcom.com>
Date: 07/15/05-02:30:12 AM Z
Message-id: <004101c58917$74337670$d3f45142@VALUED20606295>

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: "alt-photo list" <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, July 14, 2005 1:45 PM
Subject: Re: APIS, hydroquinone hardening

>
> (*) It is known that oxidized developing agents of
> p-aminophenol type in
> the developer, if not removed by sulfonation or other
> means, may bleach
> some latent image or development centers and affect
> sensitometric
> properties. This can be very cleanly explained by
> electrode process
> model of development.
Does this take place in any practical developer? Can you
recommend a place to learn more about it?

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com

Received on Fri Jul 15 02:30:44 2005