Patent ID: 8186793

Claim:
An image forming method of forming an image on a commercial printing paper using a high penetration pigmented ink by performing image processing which makes use of dot patterns corresponding to an output halftone level, wherein the commercial printing paper is composed of a base material and a coating layer on at least one side of the base material; when the commercial printing paper is brought into contact with a pure water for 100 ms in an environment of about 23° C. and 50% RH, between 2 and 35 ml/m 2 of the pure water is transferred onto the commercial printing paper; and when the commercial printing paper is brought into contact with the pure water for 400 ms in the environment of about 23° C. and 50% RH, between 3 and 40 ml/m 2 of the pure water is transferred onto the commercial printing paper.