# Detect Stress in Plastics and Glass Easily with a Polariscope

A polariscope is an essential testing instrument used to identify internal stress in transparent materials like plastic and glass bottles. By using polarized light, this device highlights stress points that may not be visible to the naked eye. This technique helps manufacturers ensure the structural integrity and quality of their products. **[Polariscope](https://www.testing-instruments.com/blog/how-a-polariscope-detects-stress-in-plastic-and-glass-bottles/)** testing is widely used in the packaging industry to detect defects before products reach consumers. It’s a simple yet effective method to enhance product safety and performance. Learn how a polariscope improves quality control and prevents product failure in industrial applications.

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