Speak to the Experts!
Call 01933 443658

Quality Guidelines March 2015

This is the document our own Quality Inspectors use to determine failures within production and we hope it may help you to identify what is, and isn’t, acceptable.

 

Single glass and sealed unit visual inspection guidelines.

 

Annealed glass – not Toughened

 

Looking at dark background with bright light source: From a distance of approximately 1mtr looking through – not at – the glass on the black background nothing should catch the eye. The glass is not removed from the inspection rack during this process. We are looking for:

 

White scratches, coating scratches, hairline scratches (that are light reflective in the production environment), dots or seeds, reflective coating damage (that is reflective in the production environment), white lines or roller marks, water marks (dried on water stains), tin splashes (from Glass manufacturer), damaged edges that will cause pressure breakages during glazing, finger prints on inner surface, debris on inner surface, size check against label.

 

Tempered or Toughened glass

 

Diffused Neon Light background: From a distance of approximately 1mtr looking through – not at – the glass on the Toughening furnace out-feed bed. We are looking for –

 

White Scratches, coating scratches, hairline scratches (that are light reflective in the production environment), dots or seeds, reflective coating damage (that is reflective in the production environment), coating burns (over temperature), coating Bubbles (over temperature) excessive bow, bi-stable bow, flicks both ways, excessive roller wave (over temperature), accreditation stamp positioning and legibility, ceramic roller marks (SO2 Gas feed)

 

Laminated glass

 

As per Annealed glass but we are also looking for:

Sandblasted safety mark positioning and legibility, edge damage from cutting (that is visible beyond the site line).

 

Satinated glass

 

As per Tempered or Toughened glass but we are also looking for:

 

Grease marks or fingerprints on the rough blasted surface

faceb Twitter youtube lkd gp