[Alt-photo] HT-2 residual hypo test

Siegfried Rempel siegfriedrempel at gmail.com
Sun Aug 6 14:22:39 UTC 2017


ANSI uses methylene blue in an involved procedure for silver processed film
(microfilm in particular).

On Sun, Aug 6, 2017 at 2:27 AM, Jacques Kevers via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org> wrote:

> Marek,
> On Philip Greenspun's LUSENET forum, in the B&W Photo - Printing &
> Finishing section, you can find this:
> [....]Deep in the instructions for the Kodak Hypo Estimator it says "This
> test procedure does not conform to the ANSI method of determining residual
> thiosulfate levels".[....]
> Likewise, on the Photographers' Formulary Residual Hypo Test it says "While
> the test is adequate for everyday printing, it is not sensitive enough to
> be used for archival printing".[....]
> http://greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=001UL5
>
> So I'm wondering whether this is the ideal way if you are looking for
> something more scientific...
> No idea on what would be more adequate, though...
> Best,
> Jacques
>
> Jacques Kevers
> Beau Site
> Première Avenue 7
> B-1330 Rixensart
> Belgium
> +32 2 653 56 02
>
> 2017-08-05 19:06 GMT+02:00 Marek Matusz via Alt-photo-process-list <
> alt-photo-process-list at lists.altphotolist.org>:
>
> > All,
> >
> >
> > I am looking for a test chart that Kodak used to sell with the HT-2
> > residual hypo test that quantifies the amount of thiosulfate in the
> paper.
> > This was used in the B&W days to test for washing of the prints. I am
> > trying to be more scientific about my salted paper printing.
> >
> > Does anybody have such a chart and could scan it for me.
> >
> >
> > Marek
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > Alt-photo-process-list | altphotolist.org
> >
> _______________________________________________
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>


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