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[...]