Canon Kabushiki Kaisha

Tomoaki Ishii

Masayuki Ikegami

Masashi Yamamoto

Kenji Moribe

Kenichi Shiiba

Yoko Taira

An aqueous ink for an ink jet including a silver particle that contains (i) a first organic monocarboxylic acid having a pKa of 4.60 or more and (ii) a second organic monocarboxylic acid having a pKa of less than 4.60 and having a carbon number of 2 or less.

Aqueous ink, ink cartridge and ink jet recording method

An aqueous ink containing silver particles, a first reducing agent and a second reducing agent, wherein the first reducing agent is a compound that has an oxidation-reduction potential R(mV) satisfying R&#x3c;0, and the second reducing agent is a compound that has an oxidation-reduction potential R(mV) satisfying R&#x2265;0 and that is at least one selected from a group consisting of tertiary amines and polyhydric alcohols in which a plurality of hydroxy groups are included in one of two structures divided according to a position between any one of two adjacent carbon atoms of the longest carbon chain in the molecule.

Growing community of inventors

Saitama, Japan

Tomoaki Ishii