Surface Compression Stress Verification (Polariscope)

Inspection template for recording non-destructive surface compression stress readings on tempered glass using a scattered-light polariscope or GASP to verify tempering level and document ASTM C1048 conformance.

Inspection Header and Sample Identification

• Inspection date and time recorded
• Inspector name and role documented
• Glass lite or sample ID recorded
• Lot, job, or order number recorded
• Glass type and nominal thickness documented
• Measurement location or orientation identified

Instrument Setup and Calibration

• Instrument type selected
• Instrument identification and serial number recorded
• Calibration status verified within required interval
• Instrument optics and viewing surfaces clean and undamaged
• Ambient lighting and setup conditions suitable for reading
• Reference standard or verification check completed

Surface Compression Readings

• Primary surface compression reading
• Secondary surface compression reading
• Additional reading or replicate value
• Average surface compression calculated
• Measurement location(s) documented for each reading
• Readings taken without damaging or breaking the lite

Acceptance Criteria and Compliance

• Measured surface compression meets project or specification requirement
• Result supports ASTM C1048 conformance
• Any out-of-specification or questionable reading identified
• Disposition selected

Non-Conformance, Corrective Action, and Sign-Off

• Deficiency or non-conformance description completed
• Corrective action or retest plan documented
• Photo evidence attached when reading is questionable or failed
• Inspector signature