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

Marek Matusz marekmatusz at hotmail.com
Sat May 6 21:58:33 UTC 2017


David
Make sure you wash the paper after sulfamic acid treatment. The residual sulfamic acid will interfere with some chemistry and it is not good for long time storage if not washed out

Marek

Sent from my iPhone

> On May 6, 2017, at 4:26 PM, Serdar Bilici via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> 
> Well I think the color comes from the gloves.
> 
> Green latex gloves gave off some color to the sulfamic acid solution.
> 
> Black nitril gloves gave off blue-purple color when using some solvent
> based pvc adhesive.
> 
> On Sat, May 6, 2017 at 11:34 PM, David Christensen via
> Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
> wrote:
> 
>> Hi, Serdar.
>> 
>> No - I used some neoprene gloves from Lee Valley:
>> 
>> http://www.leevalley.com/en/wood/page.aspx?p=31200&cat=1,190,43040
>> 
>> David
>> 
>> 
>> 
>>> On 2017-05-06 2:03 PM, Serdar Bilici wrote:
>>> 
>>> 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
>>> <mailto: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
>>> 
>>>    _______________________________________________
>>>    Alt-photo-process-list | altphotolist.org <http://altphotolist.org>
>>> 
>>> 
>>> 
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