Archived posting to the Leica Users Group, 1997/07/02

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Subject: Re: B&W RC Paper Question
From: Francesco Ricci <ricci@itc.it>
Date: Wed, 2 Jul 1997 09:40:37 +0200 (MET DST)

> As a general rule of thumb with RC papers, use a selenium toner if you are
> interested in archival permanence.  Alternatively, treat them with Agfa
> Sistan.

I've printed a lot on ILFORD RC MultigradeIV and only recently I've
discovered some problems. Some prints made with the Pearl version, which
have been exposed to light without any protection (glass), for one year
only, appear as they were toned (brown). The same effect is not present on
print with glossly surface.

I do not think it is due to an improper washing, I guess that in that case
the white parts would become yellow. In my case the white is still white but
the grey has become brown.

Any other experienced that? Selenium toning could avoid that effect?

thanks
francesco

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Francesco Ricci, IRST, Loc. Pante' di Povo, 38050 Trento, Italy
Tel: ++39-461-314334, Fax: ++39-461-302040, email: ricci@irst.itc.it
WWW   http://mnemosyne.itc.it:1024/ricci
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