Ink-ribbons comprising IR-absorbing compounds
AssigneeBASF SE
InventorsBernhard Albert, Juergen Kipper, Friedrich Closs, Helmut Bellaire
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Abstract
Ink ribbons containing one or more compounds from the group comprising phthalocyanines, the naphthalocyanines, the nickel dithiolene complexes, the methine dyes and the azulene quaternary-acid dyes, all of which have their absorption maximum in the region from 700 to 1,200 nm.
Claims8
Ink-ribbons comprising a ribbon substrate having incorporated therein one or more compounds of the class of the metal-free phthalocyanines, the phthalocyanines which have two times lithium, magnesium, tin, zinc, copper, manganese, nickel, VO, TiO, AlCl or InCl as central atom, the metal-free naphthalocyanines, the naphthalocyanines which have two times lithium, magnesium, tin, zinc, copper, manganese, nickel, VO, TiO, AlCl or InCl as central atom, the nickel-dithiolene complexes, the methine dyes or the azulenesquaric acid dyes which each have their absorption maximum within the range from 700 to 1200 nm.
Dependencies are inferred from the claim text.