Unrecopiable paper

Abstract

Abstract PURPOSE:To prevent ill use of falsification and modification by forming a solid printing layer and patterned printing layer having specific reflection density values so that recopying is prohibited. CONSTITUTION:The solid printing layer 2 is formed of sepia tone and hue ink having the reflection density values of about 1.28 yellow, 1.16 magenta and 0.8 cyan on the surface of base paper 1, and the patterned printing layer 3 is lap-printed of sepia tone and hue ink having the reflection density values of about 0.97 yellow, 0.82 magenta and 0.52 cyan on the solid printing layer 2. The solid printing layer 4 is also formed of the sepia tone and the ink having the reflection density values of about 1.05 yellow, 0.94 magenta, and 0.66 cyan on the rear face of the base paper 1; furthermore, recording characters having gloss are provided by a heat transfer method on the surface of the base paper, by which the unrecopiable paper is obtd. The ill use of falsification and modification is thereby prevented.

Inventors

• 👤 Keitaro Mitsui
• 👤 三井　啓太郎

Bibliographic Details