Device for managing printing solution in printing machine

A device for managing a printing solution in a printing machine that carries out printing while circulating the printing solution through a circulation route, the printing solution containing a resin component to be transferred onto a surface to be printed and a surfactant, the device comprising:

• a liquid supplier that supplies the printing solution containing foam generated in the circulation route with a viscosity adjusting solution for controlling the viscosity of the printing solution to break the foam,
• wherein
• the circulation route comprises
• a tank that stores therein the printing solution and that is used for controlling therein the viscosity of the printing solution, and
• a filter disposed at an entrance of the printing solution reclaiming to the tank, the filter being configured to catch the foam contained in the printing solution that flows into the filter, and being configured to drop liquid-form components of the printing solution,
• the liquid supplier comprises a spray nozzle that sprays the viscosity adjusting solution onto the foam caught in the filter,
• the filter is installed in an auxiliary tank disposed at an upper portion of the tank, and
• the auxiliary tank includes an ejector formed at a lower portion thereof, and through which the printing solution dropped through the filter flows into the tank.