[Alt-photo] Re: Sulfamic Acid for Paper Acidification

[Alberto Novo]

> I would be pleased to hear your opinions, suggestions for optimizing the
> procedure.
> I did some test using new cyanotype, argyrotype and Loris did some testing
> with ziatype and argyrotype.

Sedar, did you compared (by means of step tablet printing) the sulfamic acid 
treatment vs other acidifying methods , e.g. HCl, citric acid, etc? 

Alberto
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