Re: sizing paper for gums

Luis Nadeau (nadeaul@nbnet.nb.ca)
Fri, 21 Jul 1995 16:57:32 -0300

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>Has anybody used alum for sizing? From what I have read, the toxicity and
>permance of alum seem to be the question. But I can't really understand
>that because:
>
> 1. Alum has been used in food processing. Just yesterday I saw alum sold
> in grocery store in one of those spice racks. The description is
> that it is used for pickling.
>
> 2. The Chinese has been using alum for sizing their watercolor paper for
> thousands of years, and many of the painting last until today. Many
> of them did turned yellow, and I think that is caused by the
> acidity of the paper used.
>
> David Soemarko

There is alum and then there is alum.

Luis Nadeau
NADEAUL@NBNET.NB.CA
Fredericton, New Brunswick, Canada
"Months in the lab will save you hours at the library"

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