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Re: [ARSCLIST] shellac and acidity

Hi David,

The lacquer polymer is inherently more labile to acid catalyzed
decomposition than is shellac polymer.  Moisture will accelerate the
process for both.  The combination of moisture & a mild acidic environment
[such as found in the natural decomposition of old paper sleeves] will have
a greater potential to degrade lacquer than shellac.

All modern paper has a lower acid content than original sleeves and from a
safety standpoint replacement with plain text stock would be a vast


Duane Goldman

At 11:47 AM 6/3/2003 -0400, you wrote:
translation anyone?


>>> nauck@xxxxxxxxx 06/03/03 11:17AM >>>
I have just received lab results back from Terry Tullos Wayland, who is
paper conservator.

He says:

"Kurt, your DOF specimen is a moderately acidic pH 4.59."

For what it's worth, there you have it.

Kurt & Diane Nauck

c/o Nauck's Vintage Records
22004 Sherrod Ln.
Spring, TX  77389

Website: www.78rpm.com
E-Mail: nauck@xxxxxxxxx

Phone: (281) 288-7826
Fax: (425) 930-6862

------ h. duane goldman, ph.d. | P.O. Box 37066 St. Louis, MO 63141 lagniappe chem. ltd. | (314) 205 1388 voice/fax "for the sound you thought you bought" | http://discdoc.com

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