| 摘要 |
<p>PURPOSE:To enable an X-ray detection to be carried out promptly and correctly by mixing an X-ray impermeable pigment with an ink vehicle. CONSTITUTION:An X-ray discriminative ink is prepared by dispersing 70 to 90wt.% X-ray impermeable pigment (e.g. BaSO4) of 0.001 to 0.01mum in diameter and 30 to 10wt.% isopropyl alcohol or polyamide in an ink vehicle comprising oil, resin, solvent, plasticizer, etc. An X-ray discriminative printed layer 22 is formed by bonding a rear wrapping material 2 to the rear of a front wrapping material 1 which consists of a protruding container part 12 provided in the central part of a 400 to 500mum thick transparent synthetic resin sheet and a base part 11, and applying the aforementioned ink to a rear base layer 21 of the wrapping material 2.</p> |
