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Hello, can anyone tell me how I might find out more about materials that 
could degrade biological specimens? Specifically, we are creating a small 
display for some pinned butterflies and need to know if steel, acrylic or 
silicone inside the sealed case might affect them.

Thanks, 

Rhoda Klein
Exhibits and Programs Department
Science World British Columbia
TELUS World of Science
1455 Quebec Street
Vancouver, BC   
Canada V6A 3Z7

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