Printing is a technology that involves transferring ink to the surface of materials such as paper, fabric, leather, etc. through plate making, inking, and pressure processes, in order to replicate the content of the original manuscript in bulk. Simply put, it is a process technology that uses printing plates or other methods to transfer the graphic information from the original manuscript to the substrate. It can also be understood as the replication process of using analog or digital image carriers to transfer the colorant/pigment to the substrate.

那么该怎么防止印刷露白并处理印刷露白问题？

So how can we prevent printing exposure and address printing exposure issues?

1、油墨上机前查看油墨粘度，是否正常

1. Check the ink viscosity before using the machine to see if it is normal

印刷露白其中常见的问题便是油墨粘度过低，使用多次后更容易发生。由于在生产过程中，印刷人员常常会向油墨桶内加水，导致油墨粘度下降。然后引发印刷露白，所以上机前必定要对油墨进行检测

One common problem with printing exposure is the low viscosity of the ink, which is more likely to occur after multiple uses. During the production process, printing personnel often add water to the ink barrel, resulting in a decrease in ink viscosity. Then it causes printing to show white, so it is necessary to test the ink before starting the machine

2、查看印刷版

2. View printed version

印刷版使用久了或印刷版面油墨尘垢过多，就会下降印刷版的油墨转移量，当油墨转移量下降后，印刷露白现象就会常常发生。

If the printing plate is used for a long time or there is too much ink dirt on the printing plate, the ink transfer amount of the printing plate will decrease. When the ink transfer amount decreases, the phenomenon of printing white will often occur.

3、网纹辊网纹辊的清洁是直接影响印刷状况的，很大一部分便是网纹辊堵塞没有得到整理，这样网纹辊的载墨量就小，然后导致印刷露白现象

3. The cleanliness of the anilox roller directly affects the printing condition, and a large part of it is due to the clogging of the anilox roller and not being sorted out, which reduces the ink load of the anilox roller and leads to printing whitening

二、学会印刷露白排除办法

2、 Learn how to eliminate exposure in printing

1、先检测未印刷的纸板厚度值，再查看纸板从送纸单元出来后的纸板厚度值，看纸板是否有被送纸轮压溃。假如压溃了先处理纸板压溃的问题，送纸空隙是纸板厚度-0.3mm。

1. First, check the thickness value of the unprinted cardboard, and then check the cardboard thickness value after it comes out of the paper feeding unit to see if the cardboard has been crushed by the paper feeding wheel. If the cardboard is crushed, first deal with the problem of cardboard crushing, and the feeding gap is the cardboard thickness of -0.3mm.

2、查看印刷版压是否正常，可以查看印刷版面是否有足够的油墨量。印刷版硬度实地版适合在34-36度。<

2. Check if the printing plate pressure is normal to see if the printing plate has sufficient ink volume. The hardness of the printed version is suitable for the field version at 34-36 degrees

3、以上都无误再增加印刷压力值，压力值不该过大，过大容易发生印刷糊，印刷慢磨损加快。

3. All of the above are correct, and then increase the printing pressure value. The pressure value should not be too large, as it is prone to printing paste, slow printing, and accelerated wear

当然，假如印刷油墨粘度正确，印刷版、网纹辊仍是呈现印刷露白现象，首要调整方向以油墨工艺为主，印刷压力切勿一直加大，可以持续提高油墨粘度，及油墨的渗透性。

Of course, if the viscosity of the printing ink is correct, the printing plate and anilox roller will still exhibit printing exposure. The primary adjustment direction should be based on the ink process, and the printing pressure should not be continuously increased. This can continuously improve the ink viscosity and permeability.

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