Diluent, also known as diluent or solvent. He is the basic solvent of ink. The function of diluent is to dilute the ink to the standard viscosity set by a inkjet printer, and this process is automatically completed in the ink mixing cylinder. The inkjet printer judges whether to add ink or diluent through viscosity detector. Only when the viscosity of the ink is within the range set by the machine, the charging of the ink, the flying distance of the ink point will not deviate, and the printing effect can be guaranteed.