Method for decorating green or fired ceramic bodies by inkjet printing including the use of a ceramic inkjet ink which is prepared by milling a ceramic inorganic pigment in an organic medium in the presence of a dispersing agent which is the reaction product of a polyethyleneimine and a 12-hydroxystearic acid and ε-caprolactone co-polyester, until the average particle size of the pigment is between 0.1 and 0.8 μm.