Patent ID: 7226160

Claim:
An ink jet recording medium having an ink receiving layer formed on a substrate, wherein an ink fixing agent contained in the ink receiving layer is a serpentine compound containing at least one metal selected from the group consisting of Mg and Zn, and wherein the serpentine compound is represented by the following formula (1): (Mg a Zn b )Si 2 O 5 (OH) 2(a+b)−2 .nH 2 O (1): wherein “a”, “b” and “n” satisfy 2.7<a<3.5, 0≦b<0.25 and 0<n<3, respectively and has a bottom reflection spacing (dÅ) measured by a power X-ray diffraction method of 8.5 to 10.0 Å and a (060) reflection spacing (dÅ) of 1.53 to 1.56 Å.