| 摘要 |
PURPOSE:To obtain a clearing liquid which removes stain due to a toner developer which is extremely hard to remove, by making an electrophotographic clearing solvent to contain a nonpolar organic solvent and a polar organic solvent. CONSTITUTION:A representative nonpolar organic solvent is paraffin hydrocarbon, specially, isoparaffin hydrocarbon which is the insulating solvent of a wet type developer. A reprsentative polar organic solvent is alcohol such as methyl (ethyl, propyl) alcohol, ester such as acetate (ethyl, butyl) isoacyl, and ketone such as acetone and methyl ethyl ketone. The mixing rate of those both solvents is decided by considering the clearing effect of the clearing solvent, compatibility between both solvents, evil influence upon an electrophotographic characteristic at the time of the mixing with the developer, etc., but the range extending 10-80wt%, preferably 20-60wt% polar solvent based upon the sum of both solvents is normally used. |
