Road-looking-glasses possess the opinion of the Glass and Ceramics Institute in Cracow

The Technological description: (the extract from the opinion of the Glass and Ceramics Institute)
Convex and bent looking-glasses from the float glass about the minimum-thickness 3mm, the shining coat AL brought with the technique of vacuum fluffing. The mechanical endurance on the knock with the ball 227g coming down from the height 1,5m. The reflective safe Layer with the double layer of the varnish and with the self-adhesive foil which protects the looking-glass before the splash of the glass after the advisable or accidental break. The casing of the looking-glass performed from the resistant material on weather conditions and stuck with the looking-glass with the silicone. Assembly-handles are galvanize.

Road-convex looking-glasses U-18, about enlarged angle of the observation, complies in places, where standing at the way buildings, columns, trees etc. limit the visibility to drivers. First of all on: cross-roads and burghal streets, trips from estates, halts of the collective communication, which are situated on bows {arcs} of ways or streets, internal ways in production plants, etc. road-looking-glasses should be situated on the minimum 2,0 m high from the level of the pavement. Complies two kinds of road-looking-glasses: round U-18a and rectangular U-18b


Breaking of the looking-glass does not cause his apoptosis and values of the lecture in spite crackings are kept.