A radiation sensitive material comprises particles including a water-insoluble heat-softenable core surrounded by a shell which is soluble or swellable in aqueous medium. The material also includes a radiation sensitive component which, on exposure to radiation, causes the solubility characteristics of the material to change. The material may be positive- or negative-working and may be coated onto a substrate from aqueous media to form a radiation sensitive plate which, after image-wise exposure, can be developed in aqueous media and then heated to cause the particles to coalesce and form a durable printing image.
一种辐射敏感材料由颗粒组成,颗粒包括一个不溶于
水的热软化芯,芯周围有一个可溶于
水介质或可在
水介质中膨胀的外壳。这种材料还包括一种辐射敏感成分,在受到辐射时,这种成分会使材料的溶解特性发生变化。这种材料可以是正向或负向工作的,可以涂布在
水介质的基底上,形成辐射敏感板,经过图像曝光后,可以在
水介质中显影,然后加热,使颗粒凝聚,形成持久的印刷图像。