AGENT FOR PREVENTING STAINING OF NON-IMAGE AREA IN DRY LITHOGRAPHY, AND METHOD FOR DRY LITHOGRAPHY

摘要

PURPOSE:To provide the titled agent capable of preventing the staining of non- image area of a printed matter without deteriorating the properties of the ink, and continuing the printing keeping desirable state, by adding fine powder of silicon oxide to an organopolysiloxane. CONSTITUTION:The objective agent for preventing the staining of the non-image area is obtained by adding preferably 1-30wt% of silicon oxide fine powder (preferably the average diameter of the primary particle is 50-100mmu) to an orgaopolysiloxane (e.g. methylphenylpolysiloxane). The agent is added to an ink for dry lithography in an amount of preferably 0.5-10wt%.