Comprehensively experiments have demonstrated that aerosol fire extinguishing systems with the components detection, fire alarm and control unit along with an extinguishing generator represent a safety component that reduces the risk of fire hazard. The new extinguishing concept based on the solid matter aerosol potassium carbonate with about 20g of aerosol/m(3,) 2s reaction time and a particle size distribution from 0.5 mu m to 2 mu m ensures safe extinguishing of fires in the area of ink troughs in rotogravure fed presses. Other investigations have shown that from the point of view of fire hygiene the extinguishing agent poses no hazard to the health of employees.