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做出完美印刷品需要注意的八大事项!

来源:http://www.jindingyinshua.com   日期:2019-03-18

  一、留意察看样张

  I. Watch out for sample sheets
  ①印刷中抽样检查。进入正式印刷后不久,在开印时肯定的供墨量、上水量几会有些变化,应频繁抽样检查,停止再调整。在印刷速度坚持不变,供墨量和上水量等都处于稳定的状态时,按每印500~1000张/次的比例停止抽样检查。
  Sampling inspection in printing. Shortly after entering the formal printing, there will be some changes in the affirmative ink supply and water supply at the time of printing. Sampling inspection should be carried out frequently and readjustment should be stopped. When the printing speed remains unchanged and the ink supply and water supply are stable, the sampling inspection shall be stopped at the ratio of 500 to 1000 sheets per printing.
  ②夹入警示纸条。正式印刷中,关于发作毛病的中央,作为一种记号,应夹入细长的警示纸条,以便当于在后工序中停止检查。
  (2) Insert warning note. In formal printing, as a mark, a long warning note should be inserted into the center of the breakdown so that the inspection can be stopped in the later process.
  二、留意上水的变化
  2. Pay attention to the change of water supply
  ①留意正式印刷初期上水的变化。试印时的上水量和进入正式印刷后的上水量,几都会有些变化,一定要一边留意察看样张有无重影、水扛子,一边留意调解印版的给水量。
  (1) Pay attention to the change of water supply in the initial stage of formal printing. There will be some changes in the amount of water used in the trial printing and the amount of water used after entering the formal printing. We must pay attention to the duplication of sample sheets and water carriers, as well as the adjustment of the amount of water supplied to the printing plate.
  ②留意正式印刷过程中上水的变化。要亲密留意机器主体发热和车间内的通风情况给上水带来的影响,酒精润版要留意润湿系统冷却安装,控制好润湿液的温度,上水过少,会使印版起脏;上水过多将惹起油墨乳化,会带来一系列问题。比方印品无光泽,纸张伸缩而套印不准,延缓油墨的枯燥等。
  (2) Pay attention to the change of water supply in the process of formal printing. Alcohol wetting plate should pay close attention to the cooling installation of wetting system, control the temperature of wetting liquid, too little water will make the printing plate dirty; too much water will cause ink emulsification, which will bring a series of problems. For example, the gloss of printing products, paper flexibility and improper overprinting, delay the dryness of ink, etc.
  三、留意油墨的变化
  3. Pay attention to the change of ink
  ①留意墨斗的油墨。墨斗的油墨从墨斗辊和墨斗刮刀之间的缝隙传出,是由油墨的自重而自然被挤压出来的。因而,墨斗中油墨量的几,直接影响油墨的输出量。所以,要留意让墨斗中坚持一定量的油墨。另外,印刷油墨具有触变性质。放置在墨斗中较久,活动性会逐步变差,因此,要经常用墨刀在墨斗中搅拌,或者装置油墨搅拌器。
  Watch out for the ink in the ink bucket. Ink from the bucket roll and the bucket scraper gap between the ink, is the weight of the ink and is naturally squeezed out. Therefore, the amount of ink in ink bucket directly affects the output of ink. Therefore, we should pay attention to letting ink bucket adhere to a certain amount of ink. In addition, printing ink has thixotropic properties. If placed in the ink bucket for a long time, the activity will gradually deteriorate. Therefore, the ink knife should be often used to stir in the ink bucket, or the ink mixer should be installed.
  ②避免油墨在机器上枯燥。长时间停机如吃饭、休息时,墨辊上的油墨和墨斗中的油墨外表就会枯燥。可运用枯燥抑止剂喷在需求避免枯燥处。
  (2) Avoid the dullness of the ink on the machine. When the machine stops for a long time, such as eating and resting, the ink on the roller and the ink in the ink bucket will be dull. It can be sprayed with a dull inhibitor to avoid the dull place where the demand is.
  ③留意油墨平均,印刷品的密度视上水量、室温、机器速度不同而发作变化。应经常与规范样张停止比照检查。留意避免呈现墨色不平均现象。
  (3) Pay attention to the average ink, the density of printed matter varies depending on the amount of water, room temperature and machine speed. It should be checked regularly with the standard sample. Be careful to avoid ink inequality.
  ④坚持润湿液的pH值,油墨中添加了辅助剂后,容易影响润湿液的pH值,如pH值增大则易形成印版起脏,因而要特别留意。
  (4) Adhere to the pH value of the wetting solution. When the auxiliary agent is added to the ink, it will easily affect the pH value of the wetting solution. If the pH value increases, the printing plate will become dirty, so special attention should be paid to it.
  四、留意反面蹭脏
  4. Pay attention to the dirty rubbing on the opposite side
  反面蹭脏是由于油墨枯燥迟缓、图文墨层过厚、纸张平滑度高等缘由,使印张外表的油墨粘到上一张印张的反面的现象。
  The reason why the ink is dull and slow, the ink layer is too thick and the paper is smooth is that the ink on the surface of the printed sheet sticks to the reverse of the previous one.
  五、留意重影毛病
  5. Pay attention to the problem of duplication
  所谓重影就是用一块印版印出的图像错移,在印张上可以看到双重、三重的图影。重影的缘由有多种,比方纸张、叼牙、滚筒、橡皮布、印速、油墨黏度等各种要素十分复杂。能够采用下述办法来检查缘由并处置。
  The so-called duplication is to use a plate to print the image offset, in the printing can see double, triple images. There are many reasons for duplication, such as paper, teeth, drum, rubber cloth, printing speed, ink viscosity and other factors are very complex. The following methods can be used to examine the cause and dispose of it.
  ①印刷两次,察看套印精度,对侧规拉纸力,进纸、压纸轮、压纸机件停止检查调理。
  (1) Printing twice to check the accuracy of overprint, drawing force of opposite gauge, check and adjust feeding, pressing wheel and pressing machine parts.
  ②检查橡皮布的张力,新的橡皮布容易松弛,留意分次收紧,但也不可过于绷紧。
  Check the tension of rubber cloth, new rubber cloth is easy to relax, pay attention to tightening step by step, but not too tight.
  ③检查滚筒包衬和印刷压力。
  Check drum liner and printing pressure.
  ④查看纸张适性。纸张适性不良,特别是在叼口部位起波浪的纸张,容易发作重影,故要停止检查。
  (4) Check the paper suitability. Paper with poor adaptability, especially the paper with wavy mouth, is prone to heavy shadow, so check should be stopped.
  ⑤降低油墨的黏度。油墨黏度高,纸张不能顺利剥离橡皮布,使纸张的拖梢局部不稳定,从而产生重影。能够恰当降低油墨的黏度。
  Reduce the viscosity of ink. Ink viscosity is high, paper can't peel off rubber cloth smoothly, so that the paper's trailing part is unstable, resulting in ghosting. It can reduce the viscosity of ink properly.
济南画册印刷
  ⑥叼牙的调理。叼牙的调理不良和颐养不当,是形成重影的一大缘由。因而应定期做好叼牙的调理和维护检查,使之经常坚持良好的工作状态。
  The adjustment of teeth. Poor adjustment and improper maintenance of teeth are the main reasons for the formation of double shadow. Therefore, we should regularly do a good job in the regulation and maintenance of teeth, so that they often adhere to good working conditions.
  六、留意检查套印状况
  6. Pay attention to checking the overprint status
  连续取出20~30张印品,闯齐后将纸边捻开一点,检查前规和侧规能否定位精确(能够停止两次套印检查)。
  Continuously take out 20 to 30 sheets of prints, after finishing, twist the edge of the paper a little, check whether the front gauge and side gauge can be positioned accurately (can stop two overprinting checks).
  七、留意其他工作
  7. Pay attention to other work
  ①油墨的补充、搅拌和润湿液的补充。
  (1) Ink supplementation, stirring and wetting fluid supplementation.
  ②除脏作业。因油墨的皮渣、纸粉、纸毛等赃物吸附在印版或橡皮布上,并反映在纸张上,有必要停止除脏。除脏作业普通应停机停止。除非有能在运转时除脏的安装。绝对制止用手在运转时直接除脏。
  (2) Dirty removal. It is necessary to stop dirty removal because the ink residue, paper powder, paper wool and other stolen goods are adsorbed on the printing plate or rubber cloth and reflected on the paper. Dirty removal operations should generally be stopped. Unless there are installations that can remove dirt during operation. It is absolutely forbidden to use hands to remove dirt directly during operation.
  ③清洗橡皮布、擦版和涂胶作业。当橡皮布上堆积油墨、纸粉、喷粉粉末而影响油墨的转移时,必需停机清洗橡皮布,操作时要留意平安。擦版和涂胶作业也应留意平安。
  3. Cleaning rubber cloth, erasing and gluing operations. When ink, paper powder and spray powder accumulate on rubber cloth and affect the transfer of ink, it is necessary to stop the machine to clean rubber cloth, and pay attention to safety during operation. Rubbing and gluing operations should also pay attention to safety.
  ④留意印刷机的异常现象。留意机器运转时的声音、热度、振动、气息等,经常查看电流表,留意印刷机的异常状况。
  Pay attention to abnormal phenomena of printing press. Pay attention to the sound, heat, vibration and breath when the machine is running. Check the ammeter frequently and pay attention to the abnormal condition of the printing press.
  八、留意确认印数
  8. Be careful to confirm the print
  印刷将完毕时,应确认印数能否与消费施工单相符。有缺数需补印的应通知消费管理人员,及时布置补印。
  When printing will be finished, it should be confirmed whether the printing number is in line with the consumption construction list. Consumption management personnel should be notified if there is a shortage to be reprinted, and the reprinting should be arranged in time.
  以上内容由济南画册印刷厂家整理发布,更多相关信息可以点击我们的官网进行咨询:http://www.jindingyinshua.com
  More information can be obtained by clicking on our official website: http://www.jindingyinshua.com.