PURPOSE: To provide an image formation body to which a countermeasure is applied to prevent forgery in copying, wherein disclosure property of blind patterns and invisible property of each pattern with the naked eye for various types of black-and-white copying machines and color copying machines are improved.

CONSTITUTION: In a pattern wherein a large number of circular figures 10 having similar or different sizes are randomly scattered in such a manner that adjacent figures do not contact each other, either one of a blind pattern 11 of character, mark, etc., or a background pattern 12 is formed of halftone dots as a constituent unit of the circular figures, whereby an image formation body to which a countermeasure for preventing forgery in copying is applied is provided.