Abstract: Ink formulations comprising a solvent that is predominantly a cycloparaffin solvent. The ink formulations include conventional resins and pigments which are soluble in the cycloparaffin. The absence of aromatic solvents in the ink formulations is preferred. Ink formulations have been prepared that compare favorably to conventional ink formulations when used in gravure printing.

Abstract: A polymer latex is coagulated by passing the polymer latex and a coagulant through a screw-type extruder in which the latex and coagulant are mixed and mechanically worked under pressure by a rotating interrupted worm flight in cooperation with a plurality of stationary breaker members. At the downstream end of the extruder, the coagulated polymer is compacted and extruded. The extruded polymer is characterized by relatively low moisture content, and the excess process liquid which drains from the compacted polymer is relatively free of uncoagulated polymer.