Re: Sodium Bisulfite

From: Alberto Novo ^lt;[email protected]>
Date: 10/15/04-12:07:15 AM Z
Message-id: <>

Katharine Thayer wrote:

> A private conversation about sulfite and bisulfite for clearing gum
If you agree, we might post in public form our previous messages. I prefer
to be concise in this list, and I wrote you off-list to help clarifying us
with more details.

> A different clue is in the observation, reported in the following post
> with the heading "Color of 'tanned' gum'" that if brown-stained
> crosslinked gum (not treated with a clearing agent) is scraped off a
> support while still wet, the resulting sludge is a deep green, which
> would suggest that it consists mostly of CrIII.
What I see is that if I give a very lonk soak (say 8-12 hours) to "my
prints", the colour changes from brownish-green to pale gray-green, and "my
water" turns pale yellow. What is in the water?

Received on Fri Oct 15 00:07:37 2004

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