申请人:RISO KAGAKU CORPORATION
公开号:US20200234859A1
公开(公告)日:2020-07-23
An oil-based magnetic ink having an improved long-term storage stability is provided. The oil-based magnetic ink contains ferrite particles, a dispersant, a petroleum-based hydrocarbon solvent, a fatty acid ester-based solvent, and at least one selected from the group consisting of a glycol ether-based solvent and an alkanediol-based solvent, wherein the glycol ether-based solvent is a compound represented by R
1
O—(R
2
O)
m
—H where R
1
is an alkyl group having 4 to 8 carbon atoms, R
2
is an alkylene group having 2 or 3 carbon atoms, and m is 3 or 4, and the alkanediol-based solvent is an alkanediol-based solvent having 6 to 10 carbon atoms.