Abstract: A method for preparation of a colored ink that includes: preparing a white formulation that comprises sub-micron inorganic pigment; preparing a colored formulation that comprises sub-micron organic pigment; and mixing and grinding the white ink formulation and the colored ink formulation to provide a colored ink formulation suitable for jet ink applications. A colored ink that includes white sub-micron inorganic pigment and colored sub-micron organic pigment; wherein the colored ink is characterized by a high (color) hiding power and color density, and can meet the requirements of the PCB industry.