To form an image high in density, resolving power and glossiness by using a recording medium having a coating layer of a porous structure containing pigment, a binder and a cationic substance and ink having a specific range of surface tension.
In an ink jet recording method, when an electric signal is applied across electrodes 17-1, 17-2 the (n) region of a thermal head 15 generates heat suddenly and air bubbles are generated in the ink being in contact with this region. A meniscus 23 protrudes by the pressure thereof to emit ink 21 and recording small droplets 24 fly from an orifice 22 to a recording sheet 25 to form an image. At this time, a recording medium wherein a coating layer having surface gloss and composed of a porous structure containing pigment, a binder and a cationic substance is provided on a base material is used and color ink with surface tension of 25-40dyne/cm is used Pref., the 75° mirror surface of the surface of the recording medium is set to 45% or more.
HIROSE MIFUNE
SUZUKI EIICHI
KATAYAMA MASATO
