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注意啦!这样做才能提高印刷的质量
作者:admin 来源:http://www.sdhzyw.com 发布时间:2018-8-17 16:28:49 浏览次数:242
一、注意观察样张
First, pay attention to the sample.
①印刷中抽样检查。进入正式印刷后不久,在开印时确定的供墨量、上水量多少会有些变化,应频繁抽样检查,进行再调整。在印刷速度保持不变,供墨量和上水量等都处于稳定的状态时,按每印500~1000张/次的比例进行抽样检查。
Sampling inspection in printing. Shortly after entering the formal printing, the amount of ink supply and water supply determined at the opening of the printing process will change. Frequent sampling checks and readjustments should be made. When the printing speed remains unchanged and the ink supply and water supply are in a stable state, a sample inspection is carried out according to the ratio of 500-1000 sheets per print.
②夹入警示纸条。正式印刷中,对于发生故障的地方,作为一种记号,应夹入细长的警示纸条,以方便于在后工序中进行检查。
2. Slip the warning slip. In formal printing, the place where the fault occurred, as a mark, should be clipped into a long slip of warning paper to facilitate inspection in the subsequent process.
二、注意上水的变化
Two. Pay attention to the change of Sheung Shui.
①注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,多少都会有些变化,一定要一边注意观察样张有无重影、水扛子,一边注意调解印版的给水量。
Attention should be paid to the change of water supply in the early stage of official printing. There will be some changes in the amount of water on trial printing and the amount of water on entering the formal printing. We must pay attention to the amount of water on the mediation plate while observing whether the sample sheet has ghosts and water carriers.
②注意正式印刷过程中上水的变化。要密切注意机器主体发热和车间内的通风状况给上水带来的影响,酒精润版要注意润湿系统冷却装置,控制好润湿液的温度,上水过少,会使印版起脏;上水过多将引起油墨乳化,会带来一系列问题。比如印品无光泽,纸张伸缩而套印不准,延缓油墨的干燥等。

Attention should be paid to the change of Sheung Shui during the official printing process. We should pay close attention to the influence of the heating of the main body of the machine and the ventilation in the workshop on the feeding water. Alcohol wetting plate should pay attention to the cooling device of the wetting system, control the temperature of the wetting liquid, and if the feeding water is too little, it will make the printing plate dirty. For example, glossy printing, paper expansion and printing is not allowed to delay the drying of ink.

三、注意油墨的变化
Three. Pay attention to the change of ink.
①注意墨斗的油墨。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。因此,墨斗中油墨量的多少,直接影响油墨的输出量。所以,要注意让墨斗中保持一定量的油墨。另外,印刷油墨具有触变性质。放置在墨斗中较久,流动性会逐渐变差,因而,要经常用墨刀在墨斗中搅拌,或者安装油墨搅拌器。
Pay attention to ink of ink fountain. The ink from the ink bucket roll and the ink bucket scraper between the gap, by the weight of the ink is naturally squeezed out. Therefore, the amount of ink in ink fountain directly affects the output of ink. Therefore, we must pay attention to ink to maintain a certain amount of ink. In addition, printing ink has thixotropic properties. Place in the ink bucket for a long time, the fluidity will gradually deteriorate, so often with the ink knife in the ink bucket stirring, or installation of ink mixer.
②防止油墨在机器上干燥。长时间停机如吃饭、休息时,墨辊上的油墨和墨斗中的油墨表面就会干燥。可使用干燥抑制剂喷在需要防止干燥处。
Prevent ink from drying on machine. If you stop for a long time, if you eat or rest, the ink on the ink roller and ink will dry. Dry inhibitors can be used to prevent drying.
③注意油墨均匀,印刷品的密度视上水量、室温、机器速度不同而发生变化。应经常与标准样张进行对比检查。注意防止出现墨色不均匀现象。
Pay attention to ink uniformity, printing density depends on the amount of water, room temperature, machine speed and change. Check with standard samples frequently. Attention should be paid to prevent uneven ink appearance.
④保持润湿液的pH值,油墨中添加了辅助剂后,容易影响润湿液的pH值,如pH值增大则易造成印版起脏,因此要特别注意。

(4) Maintaining the pH value of the wetting solution, the pH value of the wetting solution is easily affected by the addition of auxiliary agent in the ink. If the pH value increases, the printing plate will be dirty, so special attention should be paid to it.

济南宣传页印刷

四、注意背面蹭脏
Four. Pay attention to the dirty side.
背面蹭脏是由于油墨干燥缓慢、图文墨层过厚、纸张平滑度高等原因,使印张表面的油墨粘到上一张印张的背面的现象。
The dirty back is caused by the slow drying of ink, thick ink layer, high smoothness of paper, so that the ink on the surface of the printed sheet sticks to the back of the previous sheet.
五、注意重影故障
Five. Pay attention to ghost fault.
所谓重影就是用一块印版印出的图像错移,在印张上能够看到双重、三重的图影。重影的原因有多种,比如纸张、叼牙、滚筒、橡皮布、印速、油墨黏度等各种因素非常复杂。可以采用下述方法来检查原因并处理。
The so-called duplicate image is printed with a plate of the image offset, on the printing plate can see a double, triple image. There are many reasons for duplication, such as paper, teeth, roller, rubber cloth, printing speed, ink viscosity and other factors are very complex. The following methods can be used to check the causes and handle them.
①印刷两次,观察套印精度,对侧规拉纸力,进纸、压纸轮、压纸机件进行检查调节。
(1) Printing twice, observe the accuracy of overprinting, check and adjust the pulling force of side gauge, feed, press wheel and press parts.
②检查橡皮布的张力,新的橡皮布容易松弛,注意分次收紧,但也不可过于绷紧。
Check the tension of rubber cloth, the new rubber cloth is easy to relax, pay attention to tightening, but not too tight.
③检查滚筒包衬和印刷压力。
Check cylinder lining 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,容易发生重影,故要进行检查。
Look at the suitability of paper. Paper suitability is poor, especially in the mouth of the paper wavy, prone to duplication, so to check.
⑤降低油墨的黏度。油墨黏度高,纸张不能顺利剥离橡皮布,使纸张的拖梢部分不稳定,从而产生重影。可以适当降低油墨的黏度。
Reduce the viscosity of the ink. The ink viscosity is high, the paper can not strip the rubber cloth smoothly, so that the tow end part of the paper is unstable, thus producing duplicate. The viscosity of the ink can be reduced properly.
⑥叼牙的调节。叼牙的调节不良和保养不当,是造成重影的一大原因。因此应定期做好叼牙的调节和维护检查,使之经常保持良好的工作状态。
Adjust the teeth. Improper adjustment of teeth and improper maintenance are the major causes of heavy shadows. Therefore, regular adjustment and maintenance inspection should be carried out regularly to keep them in good working condition.
六、注意检查套印情况
Six. Pay attention to overprint.
连续取出20~30张印品,闯齐后将纸边捻开一点,检查前规和侧规是否定位准确(可以进行两次套印检查)。
Continuously take out 20 to 30 pieces of printed matter, break through the edge of the paper will be a little twist, check the front gauge and side gauge is positioned accurately (can carry out two overprint checks).
七、注意其他工作
Seven. Pay attention to other work.
①油墨的补充、搅拌和润湿液的补充。
(1) ink supplement, mixing and wetting fluid replenishment.
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,有必要进行除脏。除脏作业一般应停机进行。除非有能在运转时除脏的装置。绝对禁止用手在运转时直接除脏。
Second, remove dirty work. It is necessary to remove dirt from the printing plate or rubber cloth because of the adsorbed stolen materials such as the ink slag, paper powder, paper wool and so on. In addition to dirty work should be downtime. Unless there is a device that can remove dirt when running. It is absolutely forbidden to use hands directly to remove dirt while running.
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,必须停机清洗橡皮布,操作时要注意安全。擦版和涂胶作业也应注意安全。
Cleaning blanket, rubbing and gluing. When the rubber cloth accumulated ink, paper powder, powder spray and affect the transfer of ink, you must stop cleaning rubber cloth, operation should pay attention to safety. Attention should also be paid to safety and rubbing.
④注意印刷机的异常现象。注意机器运转时的声音、热度、振动、气味等,经常查看电流表,留意印刷机的异常情况。
Pay attention to the abnormal phenomenon of printing machine. Pay attention to the sound, heat, vibration, odor and so on when the machine is running. Check the ammeter frequently and pay attention to the abnormal situation of the printing machine.
八、注意确认印数
Eight, pay attention to confirm the printing number.
印刷将结束时,应确认印数是否与生产施工单相符。有缺数需补印的应通知生产管理人员,及时安排补印。
When printing is finished, it should confirm if the printing number is consistent with the production sheet. If there is a shortage, the production management personnel should be informed, and the printing should be arranged in time.
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