When printing color printed materials, there are many factors that can affect the quality of the printed materials, resulting in many printed materials being not well produced. Among them, overprinting is one of the main factors that affect the quality of the printed materials. However, many factors in the printing process can affect overprinting. So, during the printing process, attention should be paid to these two major points that appear on the paper and printing plate:

一、紙張外表越粗糙，油墨的吸收量就越大。打印紙的粗糙外表，油墨泛濫現(xiàn)象更容易出現(xiàn)。這是因?yàn)橛行┘垙埨w維的交織發(fā)生的間隙，均勻的涂層還沒有很好的覆蓋。這種壓紋紙和印版時(shí)，油墨層外表發(fā)生不良接觸。如果通過適當(dāng)?shù)挠∷毫?，可以有足夠的接觸時(shí)間與油墨層的布局的紙張的平滑性差，實(shí)現(xiàn)均勻的壓印接觸，可以確保印刷墨層均勻平服。

1、 The rougher the surface of the paper, the greater the absorption of ink. The rough surface of printing paper is more prone to ink flooding. This is because some paper fibers have interwoven gaps, and the uniform coating has not yet covered them well. When this type of embossed paper and printing plate, there is poor contact on the surface of the ink layer. If appropriate printing pressure is applied, there can be sufficient contact time with the layout of the ink layer, resulting in poor smoothness of the paper, achieving uniform embossing contact and ensuring a uniform and flat printing ink layer.

二、保守膠合板面前底部支架的印刷版，不只有許多弊端，容易呈現(xiàn)油墨轉(zhuǎn)移不良現(xiàn)象，引起油墨布局不均的發(fā)生。這是因?yàn)槟静牡牡撞客斜P不夠強(qiáng)，變形的可能性也比較大，導(dǎo)致不穩(wěn)定的印刷壓力，油墨層的布局不能均勻地轉(zhuǎn)印到紙張上。更好的方法就是做好備份操作技術(shù)，一些印刷板面積較大，應(yīng)選擇一些平整度好，比擬扎實(shí)的金屬版本的護(hù)理，可以更好的防止這些現(xiàn)象的發(fā)生。

2、 The printing plate of the bottom bracket in front of the conservative plywood has many drawbacks, which can easily lead to poor ink transfer and uneven ink layout. This is because the bottom tray of the wood is not strong enough, and the possibility of deformation is also high, resulting in unstable printing pressure and the layout of the ink layer cannot be evenly transferred onto the paper. The best method is to do a good job in backup operation technology. Some printed boards have a large area, and should choose metal versions with good flatness and solidity for care, which can better prevent these phenomena from happening.

彩色印刷品在設(shè)計(jì)和疊印的處理上要注意以下六點(diǎn)：

The following six points should be noted in the design and overprint processing of color printed materials:

1、字形過小的文字應(yīng)避免選擇筆畫太細(xì)的字體，比如仿宋體、細(xì)圓體等，字體的筆畫原本就細(xì)，如果字形過小，印刷時(shí)筆畫就容易丟失，導(dǎo)致字跡不全；

1. For text with a small font size, it is recommended to avoid choosing fonts with too thin strokes, such as imitation Song typeface, thin circle, etc. The strokes of the font are already thin. If the font size is too small, the strokes may be lost during printing, resulting in incomplete handwriting;

2、尤其是細(xì)小的文字，應(yīng)避免使用多色套印；

2. Especially for small text, multicolor overprinting should be avoided;

3、盡量避免使用細(xì)小的反白文字；

3. Try to avoid using small contrasting text;

4、細(xì)小的文字應(yīng)避免疊印在深色的背景上；

4. Small text should avoid being overprinted on a dark background;

5、細(xì)小的文字應(yīng)避免使用金墨、銀墨印刷，金墨、銀墨的顆粒比一般油墨粗，用于印刷細(xì)小的文字時(shí)，容易導(dǎo)致字跡模糊等問題；

5. Small text should avoid printing with gold or silver ink. The particles of gold or silver ink are thicker than ordinary ink, which can easily lead to blurry handwriting when used to print small text;

6、盡可能采用疊印方式在底色上印文字和圖片，而不用在底色版上挖空的方式。

6. Try to use overprinting to print text and images on the background color as much as possible, without digging holes in the background color plate.