This document specifies the composition, tolerances and characteristics, i.e. mechanical, acoustic, optical, and thermal properties, of folio interlayers for the manufacturing of laminated glass and laminated safety glass for use in buildings and construction works and it defines their general quality criteria. This document does not apply to interlayers for laminated glass which are achieved by pouring the interlayer material in liquid state on or between the plies of glass or plastic glazing sheet material followed by drying or chemical or ultraviolet curing.