Compared with general printing, packaging printing has the same technical basis, but because packaging serves the product, different products have different requirements on the form and performance of packaging, so the form of packaging is diverse, packaging printing is also more diversified and complex. Compared with general printing, the technical characteristics and product characteristics of packaging printing are mainly reflected in the following aspects:
1. there are many kinds of substrates.
Generally, printing is usually carried out on paper surface printing, and packaging materials are not only carton board, but also corrugated paper, plastic, metal, glass, ceramics and various composite materials; packaging container modeling is becoming more and more diversified, there are plane and surface and irregular packaging printing. Therefore, the printing materials and forms of packaging and printing products are different.
2. diversification of printing methods
In addition to conventional offset printing, gravure printing, flexographic printing and screen printing, packaging printing often uses special printing techniques, such as stereo printing, laser holographic printing, liquid crystal printing, combination printing and so on, in order to increase some special decoration or functional effects.
3. flexible production mode
According to the requirements of the products, the production mode of packaging printing presents distinct characteristics, such as variety, specifications, high quality grade, printing quantity ranging from tens to millions of prints.
4. prepress and post processing complex
Packaging printing and printing materials are diversified, paper packaging printing and printing often need polishing, film covering, die-cutting molding and other processing; plastic packaging printing, in order to increase ink adhesion on the plastic surface and eliminate static electricity, usually before printing through corona and other ways to pre-press the plastic surface; metal packaging printing, when, Before printing, the printing ink needs to be printed, and after printing, it needs to be covered with varnish and stamped into cans.
5. packaging and printing products need to meet the packaging suitability.
In order to satisfy a series of requirements in the packaging process and the use of filling materials, packaging and printing products must have some characteristics, such as: packaging filling resistance, water resistance, light resistance, odorless and eye-catching.
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