Preparing dampening water without already mixed isopropyl alcohol for offset press, comprises preparing purified water whose conductivity is controlled to specified range, and adding e.g. acid additives and alkaline buffer and then mixing

摘要

Preparing a dampening water without already mixed alcohol used directly by a offset press equipped with the water, comprises preparing 850-900 l of purified water whose conductivity is controlled to 100 mu s/cm, and adding acid additives, alkaline buffer, a surfactant, a humidifier agent, an anti-algae agent and an anti-foaming agent and then mixing to obtain dampening water without alcohol whose pH value is 4.6-4.8 and conductivity is 800-1600 mu s/cm for direct use in the operation of offset press.