Basf Aktiengesellschaft

Siegwerk Druckfarben Gmbh & Co. Kg

Rudolf Griebel

Bernhard Albert

Karin H Beck

Walter Kurtz

Juergen Kipper

Friedrich Closs

Klaus Stammen

Karl A Kocherscheid

A solid or amorphous printing ink, especially a gravure printing ink, is fused to become printable in a fluidized condition. The ink is fixed on imprint material by solidification by heat extraction or cooling. The ink includes a binder-material having at least two component groups with each having at least one member, of which members of the first component group have the property to act as solvent for the members of the second group of components. The members of the first component group are solid state crystalline materials. The materials are solid at ambient temperature with a relatively low melting point. The members of the second component group are in a vitreous solid or amorphous condition at ambient temperature. These materials, especially polymers, are soluble in the molten first component group.

Printing ink

A liquid useful as printing ink contains one or more dyes with their absorption maximum within the range from 700 to 1200 nm selected from the phthalocyanines, the naphthalocyanines, the nickel-dithiolene complexes, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, as well as solvent and binder.

Use of a liquid containing IR dyes as printing ink

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Siegburg, Germany

Rudolf Griebel