Laminated glazing unit

摘要

A laminated glazing unit, comprises a first glass sheet, a second glass sheet and a plasticized polyvinyl chloride containing film therebetween. The first glass sheet is formed of a glass that, when at a thickness of about 2.2 mm, has an average transmittance of radiation having wavelengths in the range of 300 - 340 nm of less than about 20% and an average transmittance of radiation having wavelengths in the range of 340 - 500 nm of more than about 50%.