Provided is an ink jet printing apparatus that, without causing an increase in apparatus size, can print an image having high evenness in both of image clarity and glossiness regardless a gradation or gamut of the image. For this purpose, on the basis of input image data, pieces of multivalued color data respectively corresponding to colored inks, and first multivalued data and second multivalued data that correspond to image enhancing liquid are generated. On a print medium, the colored inks and the image enhancing liquid according to the first multivalued data are printed at nearly the same timing, and after the printing of them has been completed, the image enhancing liquid according to the second multivalued data is printed. In doing so, gloss properties appearing on the print medium can be made to fall within certain ranges, respectively, independently of input image data.