| http://www.w3.org/ns/prov#value | - A1 was overlaid on the surface of a card material comprising 100 parts of a compound of polyvinyl chloride???having a polymerization degree of 800???containing about 10% of such additives as a stabilizer, 10 parts of a white pigment (titanium oxide) and 0.5 parts of a plasticizer (DOP), and heat energy was then applied thereto through a thermal head connected to electrical signals obtained by the
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