| 摘要 |
<p>PURPOSE:To make it impossible to read or difficult to read a copied part of recorded information to be confidential even when reproducing density is thin. CONSTITUTION:A first confidential area 2 and a second confidential area 3 are provided on a printing face of a blank paper. The first confidential area 2 is printed by light reflective ink. The second confidential area 3 is provided with a light absorbing ink printing layer 3. The light absorbing ink printing layer 3 contains a background 6 having dot print pattern and ground tints 5 of solid printing scattered on the whole background. When reproducing density is sufficiently thick, a copying part corresponding to the light absorbing ink printing layer 3 becomes dark sufficiently. When reproducing density is slightly thin, a copying part corresponding to the ground tints 5 becomes dark sufficiently even if the background of the light absorbing ink printing layer 3 is not sufficiently dark. Further, when reproducing density is pretty thin, the heading item of the first confidential area will not be copied at all.</p> |
