The impact of inks on the can industry The metal surface is smooth, the texture is hard, and it does not absorb ink, so it is usually printed with heat-curable ink. Due to the different printing methods and printing materials, the composition of the ink used in the three-piece can and the two-piece can is also different. The ink used in the three-piece can (ie tinplate ink) is mainly composed of alkyd resin, phenolic resin and melamine resin. The two-piece can is printed on a round and curved surface, and the printing pressure is small, so the requirements for the performance of the ink are more stringent. The base material of the ink for two-piece cans is mainly fatty acid modified alkyd resin and polyester resin.