RE: copper prints

To: Alt-Photo Mailing List <alt-photo-process-L@usask.ca>
Subject: RE: copper prints
From: Alberto Novo <alt.list@albertonovo.it>
Date: Sun, 18 Jan 2009 21:28:54 +0100
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This message was sent replying to the message from Dick Sullivan, but I haven't seen that the "reply to" was setted to his personal mailbox:

Several baths of dilute hydrochloric acid 2%.
Develop in Dektol or HC110 for 3 minutes and wash thoroughly.
The first is a clearing bath for engraving black toner, the second is for my
platinum and palladium print gold toner.

Usually a developer bath is recommended after a copper toning on silver prints to avoid the presence of silver chloride/bromide which may give rise to mirroring especially on the shadows after some time (sometimes after some years...).
As in copper prints there are not silver compounds, I am not sure that a developer bath is an effective cure for stabilizing the print.
Have you any evidence about this? For example, washed in HCl only prints vs. washed and developed prints?
Alberto