| Zone | Permitted values with respect to one unit |
| F | Flat damages of external edges, the so-called ‘shells’ with no impact on glass durability and not exceeding the breadth of the glass edge connection area. |
| ‘shells’ on the pane surface without loose dents, filled with sealing compound. | |
| Remains in the form of spots, stains or scratches. | |
| R | Inclusions, seeds, spots, stains, etc. pane surfacev ≤1 m2 max 4 pcs à ≤ 3 mm ø pane surface > 1 m2 max 1 piece à ≤ 3 mm ø per each meter of the edge length; |
| Remains (dots) in the interlayer: pane surface ≤ 1 m2 max 4 pcs à ≤ 3 mm ø pane surface > 1 m2 max 1 piece à ≤ 3 mm ø per each meter of the edge length; |
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| Remains (stains) in the interlayer : whitish, greyish or transparent - max 1 piece ≤ 3 cm2 | |
| Scratches: the sum of single lengths: max 90 mm – single length: max 15 mm | |
| Scratches not thicker than a human hair: not permitted in greater numbers | |
| H | Inclusions, seeds, spots, stains, etc. pane surface ≤ 1 m2 max 2 pcs à ≤ 2 mm ø 1 m2 > pane surface ≤ 2 m2 max 3 pcs à ≤ 2 mm ø pane surface > 2 m2 max 5 pcs à ≤ 2 mm |
| Scratches: the sum of single lengths: max 45 mm – single length: max 15 mm | |
| Scratches not thicker than a human hair: not permitted in greater numbers | |
| R+H | Max number as in Zone R Inclusions, seeds, spots, stains, etc. from 0.5 < 1.0 mm are permitted without area limitation, concentrations in one place not permitted though. Concentration in one place: min. 4 inclusions, seeds, spots, stains, etc. per circle with a diameter of ≤ 20 cm. |
| Quality flaws ≤ 0.5 mm shall not be considered. Disturbance fields (aureole) may not be larger than 3 mm. Insulating glass: 1. In the case of insulating glass the permitted values quoted above are increased by 50% for each insulating glass pane. 2. Resinous float glass may have a corrugated surface attributable to the nature of its manufacturing process. Single security glass: 1. Local glass surface corrugation may not exceed 0.3 mm with respect to the length of 300 mm. 2. In the case of single security float glass with a nominal thickness from 6 mm to 15 mm, its bulging with respect to the length of the glass edge may not exceed 3 mm per 1,000 mm of the edge length. |
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