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(接上期)(三)制版技术该港币奥运钞的印制中使用了多种制版技术,包括平版、凸版和凹版3种版型。1.平版平版是制版时,在涂有感光树脂的版面上,感光膜层曝光变硬,未感光层不变。浸入腐蚀液(氢氧化钠、磷酸钠)中腐蚀时,未感光层溶于腐蚀液被腐蚀,经过定影液(磷酸)定影形成拒油亲水的空白膜层;感光层未被腐蚀,经过定影形成一层拒水亲油的图文膜层。最后,经过
(Continued) (III) Platemaking Technology The Hong Kong dollar Olympic gold banknote printing uses a variety of platemaking technologies, including plate, letterpress and gravure three kinds of version. 1. Lithographic lithography is plate-making, coated with photosensitive resin in the layout, the photosensitive film exposure hardens, the photosensitive layer is not changed. Immersed in the etching solution (sodium hydroxide, sodium phosphate) corrosion, the unexposed layer is dissolved in the etching solution is corroded, through the fixing solution (phosphoric acid) fixed to form a hydrophobic impermeable film; photosensitive layer is not corroded, after fixing Formation of a layer of water-repellent photo film. Finally, after