top of page
Visual Standards
Quality Standards
-
All visual inspections shall be made with 20/20 vision.
-
View glass at 90° in daylight, but not direct sunlight.
-
Stand at distance as specified by type of defect, focusing on the central area (center 80% of length and width) while looking through the glass and not directly at the surface.
-
For chips: View chips from 1' away without magnification, using localized lighting.
Visual Standards - Bowing
-
Use a "true straight edge, wire, string or monofilament fishing line."
-
Measure each of the 4 sides for overall bow on the concave portion of the glass within 1" of the glass edge and parallel to the edge.
-
Also check the approximate horizontal and vertical centerlines for overall bow.
bottom of page