16713screenprinting(編輯修改稿)
2024-11-22 21:43 本頁面
【文章內(nèi)容簡(jiǎn)介】 imited shelf life(保存期限 ) when pared to indirect materials which are basically unlimited because they are stored in an inactive form. Direct/Indirect ProcessP305 Figure ? The direct/indirect process bines the indirect and the direct photographic processes. An unsensitized film material is placed under the stencil side of the screen on a flat stencil emulsion is stored in two parts,a liquid emulsion and a the two are mixed and coated on the screen,they bee light sensitive and coat through the screen to the film the emulsion is dry,the backing sheet of the stencil is removed and normal direct exposure techniques are carried out. 印刷準(zhǔn)備 1. Squeegee刮墨板的調(diào)整 作用： 刮墨板加壓滑動(dòng)，使油墨從網(wǎng)孔透過，到達(dá)承印物 要求： a. 肖氏硬度在 60 ~ 80 b. 有良好的彈性 c. 良好的耐溶劑性和耐磨性 A. 選擇刮墨板材質(zhì) Chemical Makeup 材質(zhì)： 天然橡膠、硅橡膠、聚胺酯橡膠 C. 調(diào)整刮墨板的角度和刮印速度：影響透墨量 角度小，速度慢：透墨量大，印品墨層厚 角度大，速度快：透墨量小，印品墨層薄 B. 選擇刮墨板的形狀 Shape 直角形 Square ：平面承印物， 、薄膜 Square edge with rounded corner 圓角形：厚墨 尖角形 Double bevel： 曲面印刷 Single bevel硬質(zhì)材料 Double bevel,flat point 織物印刷 小面積實(shí)地印刷 平面承印物： 20 – 70度 曲面承印物： 30 – 65度 2. 安裝絲網(wǎng)版，調(diào)節(jié)網(wǎng)面和承印物的間隙（ H） 3. 安裝回墨板 H 0 離網(wǎng)印刷，可進(jìn)行較精細(xì)的印刷 H = 0 全接
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