Re: pinhole paper towels as acid/base indicators?

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From: NFetter@aol.com
Date: Thu Dec 06 2001 - 11:51:22 PST 

From: NFetter@aol.com
Message-ID: <25.1f74d597.2941263a@aol.com>
Date: Thu, 6 Dec 2001 14:51:22 EST
Subject: Re: pinhole paper towels as acid/base indicators?

Hi Geoff,
Were those white paper towels or brown ones? The brown ones contain a complex
mixture of chemicals some of which may respond to pH changes. I do know what
they are, because there are so many. If you used white towels, they are
mostly cellulose, resin binder, and a little bleach residue, none of which
should be pH sensitive or change color as pH changes.
Neil Fetter

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