With the development of society, Jinan printing factory has more and more development space. When we are printing, the position of color is very high, and the staff need to have the methods of color processing. The following is to introduce how to do a good job in color processing

一、在膠印中

1、 In offset printing

1、壓力的大小直接決定了印刷過程中油墨的轉(zhuǎn)移，如果印刷過程中出現(xiàn)局部的壓力不均，將導(dǎo)致印刷墨色的不實(shí)。

1. The size of the pressure directly determines the transfer of ink in the printing process. If the local pressure is uneven in the printing process, the ink color will be inaccurate.

2、橡皮布的壓縮變形是產(chǎn)生壓力的根本保證，油墨的轉(zhuǎn)移就是橡皮布?jí)嚎s變形的結(jié)果。因此，壓力的大小及均勻程度與膠印印刷用的橡皮布有著直接關(guān)系。

2. Blanket compression deformation is the fundamental guarantee of pressure, ink transfer is the result of blanket compression deformation. Therefore, the size and uniformity of pressure and offset printing blanket has a direct relationship.

3、包覆在滾筒上的橡皮布，同時(shí)受到本身張緊力和壓力的作用，隨著滾壓次數(shù)的不斷增加，橡皮布?jí)嚎s變形的應(yīng)力積累，橡皮布會(huì)變得硬挺，失去原有的柔軟性和高彈性，甚至在橡皮布表面會(huì)出現(xiàn)光亮或龜裂的痕跡，從而導(dǎo)致壓力的局部不均勻。

3. The rubber blanket coated on the roller is affected by its own tension and pressure. With the increasing of rolling times, the rubber blanket will become stiff and lose its original softness and high elasticity. Even bright or cracked marks will appear on the surface of the blanket, resulting in local uneven pressure.

4、由于橡皮滾筒安裝在印版滾筒和壓印滾筒之間，橡皮布上的每個(gè)微小單元每旋轉(zhuǎn)一周，都要分別和兩個(gè)滾筒各接觸一次。

4. Since the rubber drum is installed between the plate cylinder and the imprint cylinder, each tiny unit on the blanket has to contact with the two rollers once every rotation.

5、其受力是周期性變化的，正是由于橡皮布受力的周期性變化，會(huì)導(dǎo)致橡皮布產(chǎn)生內(nèi)耗，導(dǎo)致橡皮布的老化，影響印刷壓力的均勻性，可能導(dǎo)致橡皮布的報(bào)廢。

5. The force changes periodically. It is precisely because of the periodic change of blanket stress that internal friction will occur in blanket, which will lead to the aging of blanket, affect the uniformity of printing pressure, and may lead to the scrap of blanket.

6、橡皮布除了為膠印提供印刷壓力外，橡皮布在壓印力的作用下，應(yīng)具有很好的將印版圖文部分的油墨傳遞到承印物表面的能力，即受墨和釋墨能力，但是橡皮布的老化會(huì)改變這種油墨傳遞的能力，也會(huì)導(dǎo)致墨色不實(shí)的現(xiàn)象。

6. In addition to providing printing pressure for offset printing, the blanket should have a good ability to transfer the ink from the graphic part of the printing plate to the surface of the substrate, that is, the ability to receive and release the ink. However, the aging of the blanket will change the ink transfer ability, and also lead to the phenomenon of ink color inaccuracy.

二、印刷過程中

2、 In the printing process

1、出現(xiàn)墨色不實(shí)的原因很多，其涉及的因素也很多，包括紙張的性能、油墨的性能、印版的質(zhì)量、印刷橡皮布 的質(zhì)量、印刷壓力、印刷機(jī)的性能和印刷工藝等方面。

1. There are many reasons for the false ink color, and many factors are involved, including the performance of paper, the performance of ink, the quality of printing plate, the quality of printing blanket, printing pressure, the performance of printing machine and printing technology.

2、如果紙張、油墨的性能穩(wěn)定，印版制作質(zhì)量滿足了印刷要求，印刷機(jī)工作性能相對(duì)穩(wěn)定的話，還是出現(xiàn)了墨色印刷不實(shí)現(xiàn)象，其主要產(chǎn)生的原因就是印刷壓力的問題了。

2. If the performance of paper and ink is stable, the quality of plate production meets the printing requirements, and the working performance of the printing machine is relatively stable, there will still be ink printing inaccuracy, and the main reason is the printing pressure.

三、在平版膠印過程中常會(huì)碰到顏色印不實(shí)的現(xiàn)象，在印刷品上主要表現(xiàn)為印品實(shí)地部分有斑點(diǎn)或發(fā)虛，圖文或線條殘缺不全，圖像的階調(diào)層次再現(xiàn)性差或網(wǎng)點(diǎn)丟失。

3、 In the process of offset printing, we often encounter the phenomenon of false color printing. On the printed matter, there are spots or false marks in the field part of the printed matter, the incomplete picture and text or lines, the poor reproduction of the gradient level of the image or the loss of dot.

濟(jì)南印刷廠是以粉飾、識(shí)別、宣傳商品為主要目的而采用的印刷方式和印后加工處理技術(shù)，而對(duì)于顏色的選擇、管理、處理都是不可馬虎的，認(rèn)認(rèn)真真的處理才能減少墨色不實(shí)的現(xiàn)象。

Jinan printing factory is to whitewash, identify, publicize goods as the main purpose of printing methods and post press processing technology, and for the color selection, management, processing are not sloppy, serious treatment can reduce the phenomenon of ink color.