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A direct process for the production of a printing ink is carried out in a single vessel and consists essentially of the steps of (1) mixing a pigment slurry with a non-aqueous hydrophobic ink vehicle under agitation and with heating in a mixer equipped with concentrically arranged mixing elements an

A direct process for the production of a printing ink is carried out in a single vessel and consists essentially of the steps of (1) mixing a pigment slurry with a non-aqueous hydrophobic ink vehicle under agitation and with heating in a mixer equipped with concentrically arranged mixing elements and high-speed impeller blades to transfer the pigment from the aqueous phase to the non-aqueous phase, (2) removing the aqueous phase from the mixer, and (3) adding to the non-aqueous phase in the mixer additional ingredients to produce a press-ready printing ink. The finished ink can then be discharged, for example, through a port in the bottom of the mixer.

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A direct process for the production of a printing ink that is carried out in a single vessel and consists essentially of the steps of (1) mixing under agitation a pigment slurry which contains about 0.5 to 15 percent of pigment with a non-aqueous hydrophobic ink vehicle in a mixer equipped with conc

A direct process for the production of a printing ink that is carried out in a single vessel and consists essentially of the steps of (1) mixing under agitation a pigment slurry which contains about 0.5 to 15 percent of pigment with a non-aqueous hydrophobic ink vehicle in a mixer equipped with concentrically arranged mixing elements and high-speed impeller blades and heating to transfer the pigment from the aqueous phase to the non-aqueous phase, (2) removing the aqueous phase from the mixer, and (3) adding additional ink-making ingredients to the mixer to produce a press-ready printing ink.