Abstract
GELATIN, and a number of imported plastics like ‘Catalin 800’, ‘BT.61-893’, ‘CR-39’, ‘Marco Resin’, etc., are commonly used as model materials. Gelatin is optically more sensitive than all other materials, but has some disadvantages. The stress-optical sensitivity of gelatin1 varies considerably with the gelatin concentration, glycerine content and temperature; the recommended working range of temperature is 14°–19° C.2. In the tropics, the gelatin mix is very weak elastically at room temperature, whereas gar has proved to be more stable.
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References
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RAO, C. A New Model Material for Photoelasticity. Nature 176, 81 (1955). https://doi.org/10.1038/176081a0
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DOI: https://doi.org/10.1038/176081a0
