Re: [Marbling] alum
Aluminum sulfate (a.s.) is reported to be the best of 3 alums that work,
including ammonium a.s. (pickle alum) or potassium a.s.(fiber mordant) 1)
It will dissolve easily in hot or cold water. Not only does that make for
quicker prep time, but some marblers' feel it also means that the excess
will rinse off more easily after lifting a print. Since it is acidic that
is helpful. 2) Environmentally it is supposed to be the most sound since
the paint only sticks to the a.s. and will leave no free radicals of
ammonium or potassium to wash down the sink. For years I have primarily
used potassium a.s. on paper and fabric because I can get it locally. But on
my paper I have started using a.s. more.
>From: "Marjorie Priser" <mapriser@...>______________________________________________________
>Subject: [Marbling] alum
>Date: Fri, 24 Mar 2000 19:21:04 -0500
>Can some one tell me about alum. The instructions that I have for marbling
>with Liquitex acrylics indicates that alum from the grocery is quite OK.
> >From what I can understand, others do not recommend that TYPE of alum.
>exactly is the difference AND what does that difference produce in effect
>THANKS in advance for any help with this question.
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