We often hear that the album cover needs to do local UV, so what is UV technology? UV is actually the abbreviation of the English ultraviolet. In the printing industry, it is a special ink treatment process, also known as UV glazing process. The album cover after partial UV treatment can be more clear about the parts that need to be special. For example, after partial UV treatment, the logo part will have a sense of bulge and special brightness like varnish. After UV treatment, the text and pictures will be more textured and three-dimensional, It is more artistic and has the effect of finishing touch.

按过UV的面积来分，分为：整版UV和局部UV。

According to the area of UVs, it can be divided into full UVs and local UVs.

局部uv刚才已经举了一个例子了，而整版uv效果一般不是很明显的，从表面上看类似于过光油，但比过光油更加显亮，但对印刷品表面并不起保护作用，而过光油却对能印刷品的表面起一定的保护作用，比如防止刮花。用鼻子闻一闻，味道比较难闻，有一股塑胶的糊味。

An example has just been given for local UVs, but the overall UVs effect is generally not very obvious. On the surface, it is similar to the varnish, but more bright than the varnish, but it does not protect the surface of the printed matter, while the varnish plays a certain role in protecting the surface of the printed matter, such as preventing scratches. Smell it with your nose. It smells bad. It has a paste smell of plastic.

UV油墨也分好多种，这些油墨往往有特殊的光泽和肌理，有镜面油墨、磨砂油墨、发泡油墨、皱纹油墨、锤纹油墨、彩砂油墨、雪花油墨、冰花油墨、珠光油墨、水晶油墨、镭射油墨等等。我们常见的就是镜面UV，从字面的意思上能看出，对印刷品某个部位局部UV后，表面像一面镜子，用手摸上去很光滑，局部UV的地方和印刷品的其它部位相比感觉到有一个明显的界限，比较有立体感。

UV inks can also be divided into several types. These inks often have special luster and texture, including mirror ink, frosting ink, foaming ink, wrinkle ink, hammer ink, color sand ink, snowflake ink, ice ink, pearl ink, crystal ink, laser ink, etc. Mirror UV is a common phenomenon. Literally speaking, the surface of a part of a printed product after partial UV is like a mirror, which is very smooth when you touch it with your hand. Compared with other parts of the printed product, there is a clear boundary between the local UV area and other parts of the printed product, which is more three-dimensional.

过UV所采用的设备叫UV光固机，原理就是通过紫外光照射来固化UV油墨。局部UV既可在覆膜后实施，也可在印刷品上直接UV，但为了突出局部UV的效果。一般是在印刷品覆膜后进行，且以覆亚膜居多，约占局部UV产品的80%左右。过UV后的印刷品一般很难再回收利用。

The equipment used for UV curing is called UV light curing machine, and the principle is to cure UV ink through UV light irradiation. Local UV can be implemented either after film covering or directly on printed matter, but in order to highlight the effect of local UV. Generally, it is carried out after the printing materials are covered with film, and most of them are covered with sub film, accounting for about 80% of local UV products. Printed materials after UV are generally difficult to recycle.