Patent ID: 7871681

Claim:
An ink receiving coating for an offset paper comprising: a catalyst system operative to fix polymerisable or crosslinkable constituents of offset ink to be applied thereto, wherein the catalyst system comprises a transition metal complex, wherein a transition metal in the transition metal complex is selected from the group consisting of V, Mn, Fe, Co, Ni, Cu, Ce and mixtures thereof, and wherein the transition metal complex comprises at least one charged ligand selected from the group consisting of carboxylate and naphthenate and at least one neutral bidentate ligand and mixtures thereof, and wherein at least a fraction of a pigment part, is a fine particulate silica gel and comprises or is selectively enriched in transition metal complexes, wherein at least one transition metal complex is present in the silica and/or the other pigments in more than 10 ppb.