A compressive stress state at or near a glass surface, intentionally increased by heat strengthening or tempering.
GlassRenu · Educational illustration
Meaning and boundaries
Surface compression is not a surface coating and does not make damage harmless.
Why it matters in glass restoration
Material removal or deep damage can reduce the protective compressive layer or approach the internal tensile region.
Related terms
References
- ASTM International — ASTM C1048-25: Heat-Strengthened and Fully Tempered Flat Glass
Publisher’s original source - National Glass Association — Engineering Standards Manual, Tempering Division
Publisher’s original source - National Glass Association — Iridescence in Heat-Treated Architectural Glass
Publisher’s original source