A method for preparation of a printing plate by an electrophotographic process comprising providing a peelable first transfer layer (T.sub.1) containing a resin (A) capable of being removed upon a chemical reaction treatment on an electrophotographic light-sensitive element, forming a toner image on the first transfer layer by an electrophotographic process, either (a) providing a second transfer layer (T.sub.2) containing a resin (A) capable of being removed upon the chemical reaction treatment on the toner image and the first transfer layer in the non-image area and transferring the toner image together with the first transfer layer and the second transfer layer from the light-sensitive element to a receiving material having a surface capable of providing a hydrophilic surface suitable for lithographic printing at the time of printing, or (b) transferring the toner image together with the first transfer layer from the light-sensitive element onto the second transfer layer (T.sub.2) provided on the receiving material, and then removing the whole first transfer layer (T.sub.1) and the second transfer layer (T.sub.2) in the non-image area by the chemical reaction treatment. According to the method, printing plates which produces prints of good image qualities can be continuously obtained in a stable manner for a long period of time even when the transfer is conducted under conditions of low temperature, low pressure and high speed.
一种通过电子照相工艺制备印刷版的方法,包括提供一个可剥离的第一转移层(T.sub.1),该层包含一种
树脂(A),能够在电子照相感光元件上进行
化学反应处理后被去除,在第一转移层上通过电子照相工艺形成色调图像,要么(a)在非图像区域提供包含一种
树脂(A)的第二转移层(T.sub.2),该
树脂能够在
化学反应处理后从色调图像和第一转移层上去除,并将色调图像连同第一转移层和第二转移层从感光元件转移至具有适合于印刷时提供亲
水表面的表面的接收材料,要么(b)将色调图像连同第一转移层从感光元件转移到放置在接收材料上的第二转移层(T.sub.2),然后通过
化学反应处理去除整个第一转移层(T.sub.1)和第二转移层(T.sub.2)的非图像区域。根据该方法,即使在低温、低压和高速条件下进行转移,也能稳定地连续获得印刷品质良好的印刷版,而且时间长久。