Laminated glazing having holographic film and method for producing a laminated glazing

A method of preparing a glazing, comprising the steps of:

• stacking a first glass sheet, a first interlayer, a photopolymer film, a second interlayer, and a second glass sheet to provide a lamination stack;
• deairing the lamination stack;
• autoclaving the lamination stack to provide a laminated glazing;
• applying a reactive light to the photopolymer film in the laminated glazing after deairing and autoclaving, wherein reactive light is applied to the laminated glazing through a master holographic film;
• and
• bleaching the laminated glazing such that the photopolymer film is no longer reactive to light exposure,
• wherein a master holographic film construction comprises a support having a molded surface to which the master holographic film is laminated, an outer surface which is flat, and a plurality of openings extending from the outer surface to the molded surface, wherein the molded surface has at least one portion comprising a finite curvature,
• wherein the master holographic film has an area smaller than the at least one portion comprising the finite curvature,
• and wherein the plurality of openings is provided outside of the area of the master holographic film laminated to the molded surface.