[Alt-photo] Sulfamic Acid & Aches HP for Cyanotype

Serdar Bilici sbilici at gmail.com
Sat May 6 20:03:35 UTC 2017


Hi David,

Did you use any disposable or reusable gloves? Nitril or latex? They might
be the source of color.


Serdar

On Sat, May 6, 2017 at 10:58 PM, David Christensen via
Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
wrote:

> I'm starting to experiment with Mike Ware's cyanotype process.  To clear
> Arches HP, I've followed the directions of other on the list and have used
> sulfamic acid.  I mixed up  2L solution and put through 12 Arches papers.
> At the end of it, the solution was a light blue.  Does this indicate
> anything?  I've read that a 3L solution will clear about 40 8x10 papers -
> just wondering if the light blue indicates exhaustion or something along
> those lines?
>
> Thanks, by the way, for a most informative mailing list - this is my first
> post - I've learned a lot from it.
>
> David
>
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