Photoelastic Strains in the Preforms is the most prominent defect that usually found. This happens due to unequal distribution of the material that completely changes the refractive index of the materials and causes the Photoelastic strains. In order to prevent this defect in the preforms, the manufacturers test the preform before commencing the process of blow molding. This allows the producers to detect the flaws in the earlier stages and prevent them while blowing. The Photoelastic Strain Detector is the best machine which is used in industries to detect the defect of Photoelasticity and ensures the best quality of the products. Presto offers a premium range of Photoelasticity Strain Detector to analyze the defect in preforms and help to produce high-quality products.