Ciba-geigy Corporation

Basf Se Corporation

Alfred Hohener

Gerhard Reinert

Frank Bachmann

Kurt Burdeska

Manfred Rembold

Georg Roentgen

Chandrasekhar Dayal Mudaliar

Klaus Hannemann

Dinesh Narendra Rele

Sneha Shankar Rane

Huanzhong Wang

The present invention relates to a shading process characterized by using a composition comprising a phthalocyanine to which at least one dyestuff is attached through a covalent bonding, to shading compositions, to new compounds used in these shading compositions as well as to the production of these new compounds.

Shading process

There is disclosed a process for producing multicolor or tone-in-tone effects on natural and synthetic polyamide fiber material by subjecting flocks, slubbing, yarn or selected areas of piece goods to a plasma or corona discharge treatment before dyeing and subsequently dyeing the pretreated material with an anionic dye. Dyeings with very good differentiation of depth of shade on homogeneous polyamide fiber material are obtained by the process of this invention without the addition of resist agents or levelling agents.

Process for producing multicolor or tone-in-tone effects

Novel cationic compounds of formula ##STR1## wherein R.sub.1 and B are as defined in claim 1, are used for photochemically stabilizing basic dyeable polyamide, polyacrylonitrile and polyester fibre materials. The preparation of the novel compounds and of the novel starting materials is also described.

Cationic compounds

Growing community of inventors

Magden, Switzerland

Alfred Hohener