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Photoelastic samples can be casted! And this is, by far, the most convenient way to get it: more versatile (shape, mechanical properties, color...), cheaper and without absolutely any residual stresses. Different photoelastic materials are castable. In this section we will talk about urethane but you can also look [here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/molding-gel) to see how to make photoelastic samples from gels.
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Photoelastic samples can be casted! And this is, by far, the most convenient way to get it: more versatile (shape, mechanical properties, color...), cheaper and without absolutely any residual stresses. Different photoelastic materials are castable. In this section we will talk about urethane but you can also look [here](https://git-xen.lmgc.univ-montp2.fr/PhotoElasticity/Main/wikis/molding-gel) to see how to make photoelastic samples from gels. Acrylics are another popular photoelastic material.
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