Printing est divisa in excudendi productionem procedendi, direct printing et indirecte excudendi .
Indirecte excudendi modo quod printing atramento in layout necessitates ad transferri ad cylindricum primum, tum in atramento transfertur ad printing materiam a cylindri printing est in printing that {{I}} {{{}} et in printing in printing} {{}}
Secundum ad principium quod typis products sunt produci in printing processus inter typis pars et non-typis pars in printing laminam, potest dividi in duo genera: corporalis printing (chmiacalprinting) et eget printing (chmiacalprinting) {{I}}
In physical printing, the printing ink is a kind of accumulation and bearing in the printing part, and the part without printing is concave or convex, which is different in height from the printing part and cannot be stained with the printing ink, leaving it blank. Therefore, the transfer of the printing ink from the printed part to the material to be printed is a physical and mechanical action. General gravure printing, letterpress printing, Stencil printing, offset excudendi, etc, {{}} Omnes sunt corporalis printing (ad excudendi superficiem est altior vel minus quam non-excudendi superficiem) {{}}
Chemical printing refers to the non-printed part of the printing plate (non-printing surface) that does not stick to the printing ink. It is not because the part is low concave or convex or blocked, but because of the chemical effect, it produces a water-absorbing and ink-repellent film. The printed part (printing surface) absorbs ink and repels water, and the non-printed part absorbs water and repels ink. It is still a physical phenomenon that water and grease repel each other. However, during the printing process, the non-printed part should be added to the water tank solution to absorb water and repel. The ink film must be added with acids and glues to supply the mucous acid layer of the carboxy gene so as to keep the non-printing surface of the printing plate ex invasit ut a uncto, ita est eget printing {{XII}}