This standard applies to colorless, so-called white, luster crystal sheets (see UNI 5832-72, point 1.2.1.). The sheets are considered in their use dimensions (see UNI 6027-72, point 3.). This standard is not valid for shiny glass applied to vehicles.
UNI 6487-1975 history
1975UNI 6487-1975 plate glass. Lustrous crystal (polished and float)