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标签印刷的制版工艺流程是什么

来源:http://www.njhxsfs.com/ 日期:2019-05-05 发布人:admin   标签的广泛应用以及标签品种的不断发展自然而然地推动了标签印刷技术的发展。标签印刷涵盖了平、凸、凹、网等所有印刷方式,各国的应用情况不尽相同。不干胶防伪标签印刷涵盖了几种主要的印刷方式,在制版阶段。根据不同的产品性质,选择不同的印刷方式,针对不同的印刷方式,制版工艺也有所不同。
  The wide application of labels and the continuous development of label varieties naturally promote the development of label printing technology. Label printing covers all printing methods, such as flat, convex, concave, screen, etc. The application situation in different countries is different. Non-adhesive anti-counterfeiting label printing covers several main printing methods, in the plate-making stage. According to the nature of different products, different printing methods are chosen, and the plate-making process varies according to different printing methods.
  柔性版制版工艺流程为:原稿-菲林(阴片)-曝光-冲洗-烘干-后处理。
  The process flow of flexographic plate making is: manuscript - Film (negative film) - exposure - flushing - drying - post-processing.
  1.原稿。适合柔性印刷的原稿设计应具备如下特点:色数多。但叠印少;不要求再现特别小的细节;网线不太高,但能取得彩色印刷效果;可以联机做包装加工。
  1. original manuscript. Manuscript design suitable for flexible printing should have the following characteristics: more colors. However, there are few overlays, no need to reproduce very small details, the screen line is not too high, but it can achieve color printing effect, and online packaging processing can be done.
  2.菲林(阴片)。符合制版需要,图文清晰、尺寸大小规格准确;用磨砂菲林,要求菲林四角密度一致;使用药膜正字;用透射密度仪量度,白位密度为0.06以下;黑位密度为3.5以上。
  2. Film (negative film). It meets the requirements of plate making, with clear pictures and text, accurate size and specifications; with ground film, the four corners of the film are required to have the same density; with film orthography; measured by transmission densitometer, the white density is less than 0.06; and the black density is more than 3.5.
  3.曝光包括背曝光和主曝光。
  3. Exposure includes back exposure and main exposure.
  ①背曝光。感光树脂版的支撑膜向上、保护膜向下平铺于曝光抽屉中接受曝光。紫外光线透过支撑膜使感光粘接层固化。以建立稳固的底基,也可控制洗版深度,加强支撑膜与感光树脂层的结合力。背曝光时间根据需要的底基厚度确定。
  Back exposure. The supporting film of the photosensitive resin plate is laid up and the protective film is laid down flat in the exposure drawer for exposure. Ultraviolet light passes through the supporting film to solidify the photosensitive adhesive layer. In order to establish a solid base, also can control the depth of plate washing, strengthen the support film and photosensitive resin layer bonding force. Back exposure time is determined according to the required base thickness.
  ②主曝光。又称正面曝光,感光树脂版材支撑膜朝下,保护膜朝上。平铺在曝光抽屉中。将保护膜连续一次撕下,再将菲林药膜面贴在感光树脂版材上面。把真空膜平盖于菲林(非药膜面),抽真空,使菲林与感光树脂层贴合紧密。紫外线透过真空膜及菲林透光部分,使版材感光部分聚合固化。主曝光时间长短由版材型号和光源强弱确定。曝光时间过短会使图文坡度太直,线条弯曲,小字、小点部分被洗掉,反之曝光时间过长会敷版,字迹模糊。如果在同一张印版上有大、小宇,粗、细线条。可视情况用黑膜遮盖分别曝光。细小部分就不会因冲洗丢失,以确保印版质量。主曝光操作要点如表1所示。
  (2) Main exposure. Also known as positive exposure, photosensitive resin plate support film facing down, protective film facing up. Flat in exposure drawer. The protective film is torn off one time in succession, and then the film surface is pasted on the photosensitive resin plate. The vacuum film is covered flat on the film (non-drug film surface) and vacuum is pumped to make the film adhere closely to the photosensitive resin layer. Ultraviolet radiation penetrates through the vacuum film and the transparent part of the film, so that the photosensitive part of the plate can be polymerized and cured. The length of main exposure time is determined by plate type and light source strength. Short exposure time will lead to too straight slope, curved lines, small words, small dots washed out, and conversely, too long exposure time will cover the plate, the handwriting is blurred. If there are big and small lines on the same plate. Black film is used to cover and expose separately according to the situation. Small parts will not be lost due to flushing to ensure plate quality. The main operating points of the main exposure are shown in Table 1.
                                  不干胶防伪标签印刷
  4.冲洗。将未感光部分洗刷溶解,保留光聚合的浮雕。洗版时间长短根据印版厚薄和印纹深浅决定,洗版时间太短,版上会留下未感光的树脂而影响制版深度,洗版时间过长会使版材膨胀,导致精细部分变形或脱落。
  4. rinse. The non-photosensitive part is washed and dissolved, and the relief of photopolymerization is retained. The length of plate washing depends on the thickness of plate and the depth of print. If the time of plate washing is too short, there will be no light-sensitive resin left on the plate, which will affect the depth of plate making. If the plate washing time is too long, the plate will expand, resulting in deformation or shedding of fine parts.
  5.烘干。去除洗版溶剂,使印版恢复原来尺寸厚度。烘烤温度在50—60℃之间。烘烤时间依版材厚薄和洗版时间的长短确定,一般厚版两小时,薄版一小时。烘烤时间过长,烘版温度过高将会使印版变脆而影响印刷寿命。烘烤温度过低将延长烘干时间,烘烤时间过短,印刷时会出现烂版现象。
  5. drying. Remove the solvent to make the plate return to its original size and thickness. The baking temperature ranges from 50 to 60 degrees Celsius. The baking time is determined by the thickness of the plate and the length of the washing time. Generally, the thick plate lasts two hours and the thin plate lasts one hour. If the baking time is too long and the baking temperature is too high, the plate will become brittle and the printing life will be affected. Too low baking temperature will prolong the drying time, too short baking time, printing will appear rotten plate phenomenon.
  6.后处理。即除粘与后曝光。使感光树脂彻底硬化(聚合)达到应有的硬度指标,并消除印版粘性,以利于油墨传递。后处理时间由测试所得,目的在于不龟裂、不粘着。
  6. Post-processing. That is, debonding and post exposure. Make the photosensitive resin harden thoroughly (polymerization) to meet the required hardness index, and eliminate the plate stickiness, in order to facilitate ink transmission. The post-processing time is obtained from the test in order not to crack or stick.
 

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