[NHCOLL-L:2350] Re: Insects and glue

[Gretchen Anderson]

I have been reading this conversation with great interest. The chemistry 
of adhesives, and their aging properties is a fascinating subject. As 
Victoria noted, many adhesives cross link  overtime, becoming 
increasingly insoluble and more difficult to remove. Many become 
insoluble over time. Others become brittle as they age, or they 
discolor. "White glues" (such as Elmers) are emulsions, which 
complicates removal as they age. In addition, the over the counter 
commercial brands often have additives and preservatives that might 
complicate the chemistry. When choosing an adhesive, please be aware of 
its properties (both short-term and long-term) and its compatibility 
with what ever you are gluing.  Get advise from a conservator.

Gretchen Anderson
Conservator
Science Museum of Minnesota
www.smm.org