Oil based ink refers to a type of printing ink that uses oil as a solvent or film-forming substrate, and its basic components are usually oil, pigment, and resin. Among them, oil is the main fluid component in ink, and its selection depends on the printing material used in the ink and the quality of the image to be printed. Pigments are the color source of ink, usually using organic or inorganic pigments; Resin is an additive that increases the adhesion and durability of ink. In addition, there are auxiliary materials such as diluents and desiccants.