| abstract |
(57) [Summary] [Objective] To remove a thermoplastic resin product printed with an ink composition soluble in an alkaline aqueous solution and a printed product of a thermoplastic resin product printed with such an ink with an alkaline aqueous solution. To aim. [Structure] The invention of the present application is (A) an oligomer and / or polymer having a linear polyester as a skeleton and having 1 to 10 unsaturated double bonds in the molecule, and (B) at least one in the molecule. Has an acidic group, and A vehicle containing one or more carboxylic acids and / or one or more carboxylic acid esters and / or one or more carboxylic acid amides having 1 to 10 unsaturated double bonds, and a vehicle containing the above (A) to (B) A radiation-curable ink composition containing a photopolymerization initiator, a photosensitizer, an organic and / or an inorganic pigment depending on the above is used to print on a thermoplastic resin product whose surface is or is not treated, and is also distributed as a product. After that, the printed matter is removed with an alkaline aqueous solution. |