Date of Award

Spring 1950

Document Type



Life & Environmental Sciences


The educational value of Bio-plastic has become more and more apparent in the last few years as the method used to imbed biological specimens have improved and the plastic used in imbedding became cheaper and easier to handle.

The problem, originally, was to find a plastic material cheap enough to allow quantity production yet which when set in the mold was both clear and durable enough for demonstration methods in a classroom.

The experiments made by leading Biological supply houses with monomeric methyl or ethyl methoerylate, monomeric styrene, polymeric powders, and combinations of monomeric liquids and polymeric powders proved to be unsatisfactory. Although methocrylates are unsurpassed in clarity, their sensitivity to heat, long curing cycles, inflammability and toxicity cause them to be unsuitable for general application.