Flashlight Polariscope
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Catch hidden stress before it becomes a broken piece—see exactly where your glass needs better annealing with this essential quality control tool.
Item Name:
Flashlight Polariscope
SKU:
FLASHLGHTPOLARISCOPE
Description:
This polariscope is a handheld optical tool designed to reveal stress patterns and internal strain in finished glass pieces. It consists of a polarized light source built into a flashlight-style housing with a polarizing filter lens. When directed at glass, it illuminates areas of residual stress that would otherwise be invisible to the naked eye, appearing as colored bands or patterns that indicate where thermal shock or uneven cooling has created tension in the material.
How it is used:
Use the flashlight polariscope in a darkened studio to inspect finished work before shipping or selling. Point the light at your piece and look through the polarizing lens to see stress patterns. Pieces showing significant stress bands may need to be annealed again or cooled more slowly to relieve the tension. This tool is essential for quality control, helping you identify pieces that might be prone to cracking or breaking during use or transport, and it guides you in refining your annealing schedule for future work.
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