Patent Number: 8,722,159

Title: Recording medium

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

Inventors: Nito; Yasuhiro (Yokohama, JP), Kamo; Hisao (Ushiku, JP), Noguchi; Tetsuro (Hachioji, JP), Taguri; Ryo (Sagamihara, JP), Oguri; Isamu (Yokohama, JP), Herlambang; Olivia (Kawasaki, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B41M 5/00 (20060101)

Expiration Date: 5/13/12018