1. The specificity of printing equipment

The particularity of the printing process determines the specificity of the equipment used. Such as stereo cameras, digital cameras, holographic cameras, special plate making equipment, printing and embossing equipment, as well as post press processing and handling equipment used in special printing.

2. The relativity of concepts

The concept of special printing has great relativity. It is a printing branch developed on the basis of general printing technology using the achievements of general printing technology. If there were no advances in general printing technology, there would be no emergence and development of special printing. Therefore, the two cannot be completely separated, let alone opposed.

3. Diversity of substrates

The diversity of printing materials is mainly manifested in three aspects: * *, in addition to paper, printing materials also include cardboard, corrugated cardboard, metal, glass, fabrics, synthetic resin fibers, etc; Secondly, the printing surface is not flat, but has curved surfaces, rigid surfaces, elastic surfaces, and molded products; Thirdly, in addition to conventional specifications, there are also various size specifications for the substrate.

4. The particularity of the printing process

It is the main feature of special printing. The main manifestation is the particularity of printed materials or printed products throughout the entire production process, such as the printing principle not only including pressure printing, but also including pressureless printing; The plate making method and materials used are different, and the plate making process is also different; Post press processing does not refer to book binding, but mostly refers to processes such as coating and polishing.