Patent ID: 7950794

Claim:
An ink formulation for ink jet printing, which is free from water and from lower alkyl alcohols, comprising 1-25% by weight of one or more active solvents selected from C7-C12 aliphatic linear or branched ketones, cyclic ketones as lactones and derivatives of cyclohexanone, pyrrolidones and mixtures thereof, 50-90% by weight of a mixture of cosolvents comprising diluents that are esters selected from the group consisting of acetates, mixtures of fatty acid esters, carbonates and propionates and mixtures thereof, in an amount within a range of 30 to 80% by weight of the ink formulation, and thinners selected from monoalkyl glycolethers and dialkyl glycolethers in an amount within a range of 20% to 60% by weight of the ink formulation, 0.1-10% by weight of a binder selected from a group consisting of vinyl resins, 0.1-10% by weight of dispersants/wetting agents, and 0.1-10% by weight of pigments; the ink formulation having a flash point higher than 60° C.