| http://www.w3.org/ns/prov#value | - iphatic linear or branched ketones, cyclic ketones as lactones and derivatives of cyclohexanone, pyrrolidones and mixtures thereof. 4: An ink formulation according to claim 3, wherein said active solvent amount is within the range of 5% and 15% by weight and said solvent is a cyclic ketone selected from gamma-butyrolactone, 3,3,5-trimethylcyclohexanone and mixtures thereof. 5: An ink formulation a
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