This standard applies to flat glass in tempered sheets in dimensions and forms of use (see UNI 6027-72, point 3.), excluding reinforced, phototropic, diffusing, photosensitive, laminated glass, joined to the perimeter and/or processed on the surface.
UNI 7142-1972 history
1972UNI 7142-1972 plate glass. Tempered glass for construction and decoration