Image display body and image formation method

Abstract

An image display body in which a decorative effect is obtained more effectively by an optical diffraction structure. In an image display body, an optical diffraction structure portion constituted by the optical diffraction structure in a halftone dot state is provided in a colored region on a base material. In the image display body, a dot area percent of a halftone dot a constituting the optical diffraction structure portion to the colored region ranges from 15% to 60%, an area of each halftone dot is smaller than 0.25 mm2. The halftone dots are diffused by an error diffusion method.

Description

TECHNICAL FIELD[0001]The present invention relates to an image display body in which an optical diffraction structure is formed in a halftone dot sate and an image information method for the image display body.BACKGROUND ART[0002]A transfer foil having an optical diffraction structure forming layer is utilized for the purposes of improving design performance and security performance. The optical diffraction structure having a fine concavo-convex relief structure such as a hologram and a diffraction grating is formed in the optical diffraction structure forming layer. There is a known method of coloring the optical diffraction structure in order to improve the design performance and the security performance. For example, there is a known colored layer transfer material having a fine relief structure and a reflecting layer made of a metal colored a unique color (For example, see Patent Documents 1 and 2), as a colored layer transfer material to obtain an effect of looking like a color...

AI Technical Summary

Benefits of technology

The present invention provides an image display body and an image formation method that allows for the optical diffraction structure to appear colored and provide a decoration effect. The optical diffraction structure is formed in a halftone dot state and is colored in a region on a base material. The color is achieved by adding a colored layer on top of the optical diffraction structure. The invention also provides a method for forming the optical diffraction structure in a halftone dot state with a desired color. The method ensures that the fine concavo-convex relief structure that creates the optical diffraction effect is stable and secure. The invention also considers the synergic effect of the optical diffraction structure and the color of the region below it, resulting in a more natural and effective decoration effect.

Problems solved by technology

However, in the above colored layer transfer materials, because the fine concavo-convex relief structure such as a hologram and a diffraction grating which exerts the optical diffraction effect is not provided, the particular design or the optical effect cannot be obtained.

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