[Alt-photo] LIVE WEBCAST ON REMOVING RESIDUAL FE

Siegfried Rempel siegfriedrempel at gmail.com
Wed Oct 28 16:07:08 UTC 2015


Who did the webcast?
Siegfried Rempel
siegfriedrempel at gmail.com

On Wed, Oct 28, 2015 at 7:56 AM, bobkiss caribsurf.com via
Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
wrote:

> DEAR LIST,
>
> I just watched a live webcast on removing residual Fe compounds from
> existing PT/PD prints. It appears that, for processing of new prints good
> old EDTA with some meta bisulfite will do an excellent job. Removing Fe
> from older prints requires some stronger chems like adding Sodium
> Dithionite to EDTA and other chems but they did not recommend using it for
> clearing new prints.
>
> Just a non-chemist's observations.
>
> CHEERS!
> BOB
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>


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