Re: Another Ziatype question

Jim (the maker of those wonderful palladium over injkets right?) and Ryuji,

I think I can find EDTA in my location. AFAIK, there are two types of it.
Which one should I use?

As I said to Sandy, will try to make the initial wash in 4% citric acid too.

Thanks,
Loris.

----- Original Message -----
From: "Jim Collum" <jcollum@airespace.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, October 11, 2004 9:17 PM
Subject: RE: Another Ziatype question

> i've had real good luck with EDTA removing the stain with ziatypes (i
> print on COT320)

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>; <sanking@CLEMSON.EDU>
Sent: Monday, October 11, 2004 9:03 PM
Subject: Re: Another Ziatype question

> ...
> Unless the solution contains reducing agents, Fe(II) ions are
> converted to Fe(III) in neutral to alkaline pH, and make ferric
> hydroxide like you mentioned. If the intention is removal of iron, it
> is best you don't let this happen. I would try acid DTPA or EDTA
> solution to facilitate removal of iron.
Received on Mon Oct 11 12:38:03 2004