Sandoz Gmbh

Sandoz Ltd., (sandoz Ag)

Fidelity Union Trust Company, Executive Trustee Under Sandoz Trust

August Schweizer

Alfred Frei

Georg Schoefberger

Helmut A Moser

Zdenek Allan

A process for the dyeing of paper with granulated dyeing preparations, preferably dissolved in water. For the process granulated dyeing preparations are used which consist of

Process for producing colored paper using granulated dye compositions

Concentrated, liquid preparations of metal-free direct azo dyes, which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the stock and for dyeing paper sheet.

Concentrated aqueous dye compositions containing a low molecular weight

Stabilized dye compositions comprising a dye of the formula ##STR1## OR A SALT THEREOF, WHEREIN EACH Me is copper or nickel,

Compositions of metal complexes of disazo acid dyes stabilized with

Concentrated, liquid preparations of metal-free direct azo dyes which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the stock and for dyeing paper sheet.

The invention concerns a novel process for the production of benzidine compounds having at least one nuclear sulphonic acid group, comprising reacting a nitro- or nitroso-benzene with an aniline or mono-N-alkyl aniline, reducing the reaction product to a hydrazo compound and rearranging this to the benzidine compound.

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Muttenz, Switzerland

August Schweizer