Prepress operation refers to the early stage of printing process, including typesetting, color separation and scanning. The importance of its work is to master the software used in the prepress operation, to understand the basic operation process of printing technology, and to have outstanding graphic and image processing ability.

As for those who want to transfer from computer graphic drawing to prepress, their primary mission is to master the printing professional knowledge at all costs after touching the prepress work, otherwise they will be unable to carry out the work.

The common sense of characters is the writing symbol used to record and convey speech.

The characters used in printing can be divided into type, font, size, etc.

1. Font in the domestic printing profession, the main types of characters are Chinese characters, foreign characters, national characters and so on. Chinese characters include song style, regular script style, bold type and so on. Foreign characters can be divided into white type and black type according to the thickness of the characters, or can be divided into regular type, italics type, fancy type and so on. Ethnic characters refer to the characters used by some ethnic minorities, such as Mongolian, Tibetan, Uyghur, Korean, etc.

Song typeface: Song typeface is one of the most widely used typefaces in printing profession. According to the different shapes of characters, it can be divided into book song and newspaper song. Song typeface is a type of typeface that originated in Song Dynasty when engraving printing. The characters of the Song Dynasty are square in shape, horizontal and vertical, thin in horizontal and thick in vertical, clear in edge, careful in layout, regular and even, with strong stroke regularity, which makes people feel comfortable and awake when reading. In modern printing, it is mainly used for the text of books, periodicals or newspapers.

Regular script: regular script, also known as living script, is a kind of font that imitates the habit of handwriting. Its strokes are neat and uniform, and the shape is regular. It is widely used in students' handouts, popular reading materials, annotations, etc.

Boldface: also known as square or isoline, boldface is a kind of thick and robust font with square face. The font is upright, the strokes are horizontal and vertical, the handwriting is the same thickness, and the layout is eye-catching. Boldface is suitable for the eye-catching notes or comments caused by the title or demand. Because the font is too thick and robust, it is not suitable for typesetting some text.

Imitation song style: imitation song style is a kind of elegant and upright font with the layout of song style and the strokes of regular script. The strokes are even in thickness. It is often used to typeset subtitles, poems, essays, annotations, quotations, etc. in some reading materials, it is also used to typeset some text.

Art style: art style refers to some unusual and special typefaces, which are usually used to beautify the layout. The strokes and layout of art style are usually visualized, which are often used for the titles on the cover or page of books and periodicals. If properly used, they can effectively enhance the artistic taste of printed products. There are a wide variety of this type of font, such as Han Ding, Wen Ding and other fonts.