PURPOSE: To prevent blurring to non-image parts or damaging of the surface of a printing plate from occurring, easily, obtain a beautiful printed matter and ensure favorable properties on a safety and hygienic basis, by constituting the titled liquid of ethylene glycol dimethyl ether and an alcohol and/or water.

CONSTITUTION: Ethylene glycol dimethyl ether which is a good solvent for a toner to which the liquid is applied is combined with an alcohol and/or water which is a poor solvent for the toner. Although ethylene glycol dimethyl ether is able to instantaneously dissolve the toner, the sole use thereof caused blurring to non-image part. To avoid this, an alcohol and/or water is added to the ether, whereby blurring to the non-image part can be prevented from occurring, while retaining the toner-dissolving capability. The alcohol is preferably an alcohol of general formula R-OH, wherein R is 1W5C alkyl, which is low in toxicity.