| abstract |
PURPOSE:To obtain superior photosensitivity, wide development latitude, and good printing resistance by using a compsn. composed of a compd. producing acid upon irradiation of actinic rays, and a compd. having a silyl ether group decomposable with acid. CONSTITUTION:The compsn. is composed of the compd. capable of producing an acid upon irradiation of actinic rays represented by formula II or III, R1 being aryl, alkenyl, or the like, R2 being R1, -CX3, or alkyl, and X being Cl or Br, and a compd. having at least one silyl ether group decomposable with acid in the molecule represented by formula I, thus permitting the obtained positive type photosensitive material to be high in photosensitivity, wide in development latitude, superior in storage stability, storable for a long term, superior in printing resistance, simple and easy in manufacture, and usable for a lithographic plate, etc. |