Evaluation of features using light and images reflected from a glass surface or glazing assembly.
GlassRenu · Educational illustration
Meaning and boundaries
It does not replace transmitted-light inspection; coatings, background, scene, angle, flatness, and temperature can change the result.
Why it matters in glass restoration
It is important for reflective coatings, surface marks, gloss changes, and post-restoration distortion.
Related terms
References
- National Glass Association — Guidelines on How to View Decorative Glazing Products
Publisher’s original source - ASTM International — ASTM C1376-21a: Pyrolytic and Vacuum Deposition Coatings on Flat Glass
Publisher’s original source - ASTM International — ASTM C1652/C1652M-21(2025): Measuring Optical Distortion Using Digital Photography of Grids
Publisher’s original source