Magnifying plastics transparency prodn. by efficient, economical method

摘要

The prodn. is of plastics transparencies, esp. with relief characters (I) and/or picture elements, with plastic profile layer(s) (2) produced by plastic forming and a colouring film (3) bonded to this. The profile layer is made from a sheet of plastics (I) by vacuum deep drawing, then the cavities (4) on the back are filled with a transparent filler material (5) and the colouring film (3) is placed on the back. Also claimed are the transparencies per se.