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Subject: Rhoplex WS24

Rhoplex WS24

From: Stephen Koob <koobsp<-a>
Date: Friday, August 5, 2011
Anne T. Lane <alane [at] charlottemuseum__org> writes

>It has been suggested to me to use Rhoplex WS24 as an
>adhesive/topcoat for the application of "permanent" labels to museum
>artifacts, citing its reversibility in acetone and its relative lack
>of toxicity compared to B72, commonly used for this purpose. I am
>curious as to the aging properties of this material, its shelf life
>once opened, and of course its suitability for use on the types of
>objects that one would normally label using B72.

I first recommended Rhoplex WS-24 (previously known as "Acrysol" or
"Primal") for conservation use at the 1981 AIC Meeting.

I still have some WS-24 from 1980 that has been opened, and opened
again, and it is still fine.  I also have cast films from 1980 that
are still easily soluble in acetone.  Similar to B-72, it has a
glass transition temperature (TG) of 40 deg. C and a pH of 7. It has
good adherence to most materials, including glass.

I do not know that anyone has tested its long-term stability.

Stephen Koob
Chief Conservator
The Corning Museum of Glass
One Museum Way
Corning NY 14830
607-438-5242


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                  Conservation DistList Instance 25:11
                 Distributed: Saturday, August 20, 2011
                       Message Id: cdl-25-11-007
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Received on Friday, 5 August, 2011

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