A durable marking intended to remain on the glass and communicate product, certification, or traceability information. Examples can include a tempering or safety-glazing bug, manufacturer designation, certification mark, standard reference, production date, lot code, or serial number.
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Meaning and boundaries
The corner tempering logo or 'bug' is one specific type of permanent glass marking. A manufacturer logo, lot code, or serial number is not by itself a tempering mark and does not independently prove that the glass is tempered or safety-glazing certified.
Why it matters in glass restoration
Each visible marking should be photographed and transcribed exactly before restoration because different elements can identify the manufacturer, treatment, certification, standard, thickness, date, plant, lot, or product.
Related terms
References
- National Glass Association — GANA Glazing Manual, 2022 edition
Publisher’s original source - National Glass Association — Marking and Labeling of Architectural Glass
Publisher’s original source - Office of the Federal Register / CPSC — 16 CFR Part 1201: Safety Standard for Architectural Glazing Materials
Publisher’s original source