Method of producing a package from a sheet having lenticular lens in pre-selected areas

A method of producing a package from a lenticular sheet having anisotropic optical properties comprising the steps of:

• providing a substrate of transparent material having a first side and a second side and an index of refraction greater than one;
• forming at least one lens pattern having a plurality of lenses on the first side of the substrate in pre-selected portions thereof, wherein a desired optical effect is produced in the pre-selected portions only;
• and
• forming a pre-determined package design from the substrate;
• wherein the remainder of the first side of the substrate is unaltered,
• wherein the step of forming at least one lens pattern further comprises the steps of:
• engraving a plate or cylinder with a desired lens pattern;
• masking desired portions of the engraved plate or cylinder;
• electroplating the plate or cylinder with a metal;
• cutting back the electroplated metal to a desired level;
• removing the masking from the desired lens pattern;
• and using the resulting plate or cylinder in an extrusion embossment process such that the substrate can be embossed with the remaining lens pattern.

A method of manufacturing a package from lenticular sheet comprises the steps of:

• engraving a desired lens pattern into a surface metal of a flat metal plate or a cylinder, wherein the surface metal of the plate or cylinder in which the pattern is engraved into is loosely bonded to a base thereof and can be removed to become an engraved metal shell;
• cutting the engraved metal shell to the desired shape;
• and
• fastening the metal shell to the cylinder or plate to be used to produce the transparent patterned sheet such that the lens pattern runs along a pre-selected direction;
• and
• forming a pre-determined package design from the lenticular sheet.