Polariscope COE Test Card

Polariscope COE Test Card
[COEtestcard ] Bloomington Warehouse

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EA $12.00

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Polariscope COE Test Card. All you nees to do is sandwich your fused galss piece between the backlit fims. You can use a bright flashlight. If you don't see a halo the glass is compatible, if you see a halo it signals stress in the glass and incompatibility.