Re: Eliminating CaCO3 in buffer in "achival" watercolor papers

[Loris Medici <mail@loris.medici.name>]

Thanks Dirk,

This is reassuring -> will try the acetic acid way. BTW, I'll prefer to
use pure acetic acid since vinegar contains other unwanted compounds.

Regards,
Loris.


12 Ağustos 2008, Salı, 2:09 pm tarihinde, Dirk-Jan Treffers yazmış:
> Hi Loris,
>
> Indeed, acetic acid might be a good solution to your problem. Regular
> houshold vinegar (usually a 4% acetic acid solution) will probably do
> just fine.
> Calcium acetate indeed has good solubility characteristics in water.
> There are more products that will result in water soluble salts to
> clear any CaCO3, but they probably will ruin your paper, or are very
> damaging to your health (HCl, HBr, Benzoic acid, chromic acid, to name
> a few...).
>
> According to my chemical books from university (I studied chemistry),
> acidic acid is by far the most preferable option. And household
> vinegar is the easiest form it comes in :-)
>
> kind regards,
>
> Dirk-Jan