RAINBOW SHEETING HAVING DISTINCT COLOR CHANGES AND/OR HIDDEN IMAGES

摘要

This invention relates to graphic films which exhibit a rainbow-like color image visible at certain conditions of illumination and observation, but, additionally expands the range of visual effects to produce very subtle hidden images, or 3-dimensional appearing images, or more dramatic images which change from photographic positive to a photographic negative or vice-versa as the viewing angle is changed relative to the illumination source.