| 摘要 |
<p>There is disclosed a photo-set resin letterpress characterized in that the said letterpress includes a relief layer having a base layer (A) formed by photo-setting and a top layer (B) in that order, and the thickness of the relief layer of a highlight portion constituting a pattern, in which a dot percent is less than 7 %, is less than the thickness of the relief layer of a portion other than the highlight portion. The photo-set resin letterpress according to the present invention has a liquefied photo-sensitive resin layer of a minimum insoluble light quantity (QA) as a bottom layer and a liquefied photo-sensitive resin layer of a minimum insoluble light quantity (QB) as a top layer, and a multi-layer photo-sensitive resin layer in which QB is more than 23 millijoule/cm<2> and more than five times the QA can be obtained by the exposure through of image. By use of the photo-set resin letterpress according to the present invention, the highlight portion can be prevented from thickening and a printing pressure can be applied, so that high printing quality which is bright and rich in gradation can be obtained.</p> |
