| 摘要 |
<p>The invention provides a method of forming a stencil for screen printing machines, comprising a screen (3) stretched in a frame and a layer (11a, 11b, 11c) affixed to said screen and provided with a printing pattern, by exposing a light-sensitive film (10) which comprises a light-sensitive layer (11) applied to a layer substrate (12), with an image corresponding to said printing pattern and then developing the light-sensitive layer of the exposed light-sensitive film, thereby to produce dark portions corresponding to portions illuminated during the exposure, said method being characterised in (a) that the said dark portions are removed by an etching or bleaching process from the layer (11), thus leaving the substrate bare (5c, 6c) to form the pattern to be printed, the remaining layer (11a, 11b, 11c) forming margin lines against the desired printing pattern; (b) that the said substrate (12) with the remaining unetched or unbleached layer, in order to form margin lines against the desired printing pattern, is placed against the screen (3) stretched in the frame, such that the said remaining layer is caused to interact with the screen; (c) that, after said interaction between the remaining layer (11a, 11b, 11c) and the screen (3) has been established, only the substrate (12) is removed; and (d) that a stencil intended for screen printing machines and provided with a layer having a printing pattern is formed. e</p> |
