[pure-silver] Re: Opinion Please!
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 24 Nov 2009 21:24:21 -0800
----- Original Message -----
From: "John Stockdale" <j.sto@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, November 24, 2009 8:58 PM
Subject: [pure-silver] Re: Opinion Please!
Eric, I haven't forgotten about the Rodinal formula. I've
saved a number of posts from rec.photo.darkroom especially
from Michael Gudzinowicz and when I've tidied them up I'll
post it.
The upshot of the posts is that Agfa altered Rodinal in, I
think, the 1960s. The amount of p-aminophenol was reduced
and the pH was increased to compensate. p-aminophenol is
not an expensive chemical, but sodium/potassium hydroxide
is much cheaper! Reminiscences of Agfa Viradon having
its only expensive ingredient removed also (selenium)!
John
I wonder how Michael is doing these days. I miss his
posts. He was chased off by a person who was not very
respectful of him.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
