Liam Lawless (lawless@vignette.freeserve.co.uk)
Fri, 12 Mar 1999 02:59:18 +0000
Hi Kurt,
Ammonia is a solvent of silver salts. Clerc suggest a 1% solution for
removing silver nitrate and silver chloride in the copper-silver
intensification process, but says it has no effect on silver iodide. No
idea what action it would have on dichromate/permanganate stain, but
something else to try one day...
I make more time by not sleeping.
Thanks,
Liam
-----Original Message-----
From: Kurt Seefeldt <seefeldt@s.imap.itd.umich.edu>
To: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
Date: 11 March 1999 13:56
Subject: Re: Reversal Bleach & Contrast Control
>
>I read an old booklet the other week with some formulas for reducers
>and remember seeing the use of "a few drops of ammonia in a tray of
>water" to clear either chromate or permanganate stains (I can't
>remember which one). It gave a clearing time of "a few seconds". I
>think it was the typical household ammonia. The language suggested
>that this is not the optimum procedure, but rather a last resort.
>Again, I can't remember whether it was for chromate or permanganate
>clearing. Sorry.
>
>I'm hoping to actually finish my dark room (aka basement bathroom) so
>I can try this reversal processing. I got the chemicals early last
>week, now all I need is to get the package of spare time that I
>ordered a while back (it was on backorder).
>
>- Kurt
>
>
>
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:09:02