[Alt-photo] mixing solution

Loris Medici mail at loris.medici.name
Wed May 10 15:56:58 UTC 2017

Never add water into acid!!! That's rule #1 when working with acids.

You may add 600ml water into a 1000-1500ml beaker, then add citric acid
constantly stirring and then add more water to make 1000ml.

If I remember correctly, mixing citric acid into water is endothermic (the
solution temperature goes down...), therefore you may opt to warm the water
beforehand; (to 40-50C in the microwave owen) the acid will go into
solution faster...

On May 10, 2017 6:44 PM, "Bob Cornelis via Alt-photo-process-list" <
alt-photo-process-list at lists.altphotolist.org> wrote:

> I am using Ware cyanotype and want to try his suggestion of adding some 40%
> citric acid solution to sensitizer to allow it to work with a wider range
> of papers. I'm not used to mixing this high a concentration of solid to
> liquid so am looking for the correct procedure.
> If I wanted to end up with 1 liter of this solution, would I start with
> 400gms of citric acid and add water to make 1 liter?
> Thanks
> Bob
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