Patent ID: 8722159
Filing Date: 2014-05-13
Classification: B41M

Abstract:
1. A recording medium comprising: an ink-receiving layer on a substrate, wherein the ink-receiving layer contains a hydrated alumina, an alkylsulfonic acid having 1 to 4 carbon atoms, and a salt of a compound represented by general formula (1): wherein n represents 1 or 2; X 1 and X 2 each independently represent H, NH 2 , or COOH, and at least one of X 1 and X 2 represents NH 2 or COOH; R 1 and R 2 each independently represent an alkylene group, an arylene group, or a heteroarylene group, and R 1 and R 2 may be bonded to each other to form a ring, and wherein a proportion of the alkylsulfonic acid having 1 to 4 carbon atoms with respect to the hydrated alumina is in the range of 1.0% by mass to 2.0% by mass, wherein a proportion of the salt of the compound represented by general formula (1) with respect to the hydrated alumina is in the range of 0.5% by mass to 5.0% by mass.