| 摘要 |
PURPOSE:To give a printing plate which can remarkably reduce ground stain or stain around the image area by carrying out development with a developer prepd. by adding a specified compound contg. a moiety having nonaffinity for a liq. carrier used. CONSTITUTION:A compound contg. a moiety having nonaffinity for a liq. carrier used is synthesized as white latex of about 0.05-5mum particle size. The compound contains at least one among 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate and 2-hydroxypropyl methacrylate as a component of the moiety by >=5wt% of the amount of the moiety. The latex is diluted with the liq. carrier, colored with a colorant and mixed with a charge regulator to prepare a developer. Excessively high concn. increases ground stain and excessively low concn. lowers image density, so the preferred concn. is 0.3-3.0wt% (expressed in terms of solid matter). |
