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AssigneeDainichiseika Color & Chemicals Mfg. Co., Ltd.
InventorsMasayuki Takahashi, Yasuyuki Ogisu, Katsufumi Iiboshi, Masahiro Kondo, Takao Mizumoto, Kathufumi Awaya
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A removable ink composition comprising (A) at least one of a urethane resin and an acrylic resin and (B) a vehicle including as a main component one or more substances selected from the group consisting of a styrene-acrylic acid copolymer, a styrene-maleic acid resin, a rosin-maleic acid resin and a phenol resin. A process for removing an ink composition from printed articles which comprises treating articles printed with this ink composition with an aqueous alkali solution. Prints of the ink composition on plastic films and plastic containers can be removed and decolorized in a short time by treating the ink composition with a dilute aqueous alkali solution having a concentration of 1 to 3%.
A removable ink composition comprising (i) a component (A) comprising a urethane resin and a cellulose resin and (ii) a component (B) comprising a vehicle comprising as a main component one or more substances selected from the group consisting of a styrene-acrylic acid copolymer, a styrene-maleic acid resin, a rosin-maleic acid resin and a phenol resin, wherein the removable ink composition is resistant to water and is removable by a dilute aqueous alkali solution having a concentration of 1 to 3%.
Dependencies are inferred from the claim text.