Ilford Imaging Switzerland Gmbh

Ciba-geigy Ag

Arnd Kriebel

Jean-Luc Gremaud

Ink set for ink jet printing comprised of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the yellow ink contains a mixture of at least one yellow dye with reddish hue of formula (I), wherein R, M, R, R, p, n and m are as defined in the specification and wherein R, M, R, R, R, n and m are as defined in the specification.

Ink set for ink jet printing

Ink set for ink jet printing consisting of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the magenta ink contains, as first dye component, at least one dye of formula (I) wherein Rand Aryl are as defined in the specification,or of formula (II) wherein M, Rand Aryl are as defined in the specification and, as second dye component, at least one copper complex azo dye of formula (III) or of formula (IV) wherein M, R, R, R, R, R, Rand Rare as defined in the specification.

Photographic direct-positive emulsions with silver halide crystals of layered structure are prepared. The silver halide crystals of these emulsions can form a latent internal image and are superficially converted to silver iodide. Normal surface developers are suitable for developing.

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Marly, Switzerland

Arnd Kriebel