A chip, pit, scratch, or clustered surface flaw caused by rock, aggregate, mortar, masonry fragments, or similar hard debris striking or dragging across glass.
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Meaning and boundaries
Impact damage must be distinguished from cementitious residue, chemical runoff, and media blasting even when all arise during masonry work.
Why it matters in glass restoration
Impact can create subsurface cracks or strength-reducing flaws beyond the visible mark, making cause, depth, location, and glass type important.
Related terms
References
- GlassRenu — Rock and Masonry Damage
Publisher’s original source - National Institute of Standards and Technology — Fractography of Ceramics and Glasses, 3rd edition
Publisher’s original source - National Bureau of Standards / NIST — The Science of Ceramic Machining and Surface Finishing II
Publisher’s original source