| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packaging aluminum foil, which makes it possible to easily check whether a flaw is present on an aluminum body under a display in examining the packaging aluminum foil with the printed display. <P>SOLUTION: According to the packaging aluminum foil, the display, such as characters or patterns, is printed on the surface of the aluminum foil body, using a printing ink containing a black pigment. According to the black pigment, a black pigment body is coated with a synthetic resin film and is made of the perylene black that is represented by the structural formula (I). Hence the display, which is printed using the printing ink containing the above black pigment, has superior infrared permeability. By emitting infrared rays on the aluminum foil with the printed display, therefore, a flaw is present on the aluminum foil body under the display can be easily checked. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
