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    • 7. 发明授权
    • Pre-bake printing plate composition
    • 预烤印版组成
    • US5213950A
    • 1993-05-25
    • US929655
    • 1992-08-12
    • Thomas J. Dooley
    • Thomas J. Dooley
    • B41N3/08G03F7/40
    • B41N3/08G03F7/40
    • An aqueous composition useful for the protection of actinic light-exposed presensitized lithographic printing plates. The composition comprises an effective amount of (a) an ammonium, sodium, potassium or lithium salt of a strong organic acid, and (b) an ammonium, sodium, potassium or lithium salt of an anionic surfactant which contains functionalities of the salt of a strong organic acid and the salt of a weak organic acid, and (c) an ammonium, sodium, potassium or lithium salt of a weak organic acid. The composition is applied to the surface of the plates after they have been developed, but before they have been baked, thereby preventing surface contamination that would otherwise occur from the heat treatment.
    • 一种水性组合物,可用于保护光化性光暴露的平版印刷版。 组合物包含有效量的(a)强有机酸的铵,钠,钾或锂盐,和(b)阴离子表面活性剂的铵盐,钠盐,钾盐或锂盐,其含有 强有机酸和弱有机酸的盐,和(c)弱有机酸的铵,钠,钾或锂盐。 组合物在显影后施加到板的表面,但在其被烘烤之前被施加到板的表面,从而防止否则从热处理发生的表面污染。