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Re: [ARSCLIST] shellac and acidity

On 03/06/03, Kurt Nauck wrote:
> I have just received lab results back from Terry Tullos Wayland, who
> is a paper conservator.
> He says:
> "Kurt, your DOF specimen is a moderately acidic pH 4.59."
> For what it's worth, there you have it.

If you want to measure pH yourself on a small budget, check out the
tropical fish hobbyist suppliers. They should have indicator dyes in
stock which change color according to the pH.

Don Cox

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