In terms of printing techniques, how many printing techniques were available during the Han Dynasty?

In terms of printing technology, there were already many kinds of printing technology such as printing and dyeing, clip dyeing and batik in Han Dynasty. (1) Printing and dyeing. It is letterpress printing, which appeared in the Spring and Autumn and Warring States, and became very mature in the Han Dynasty, in which a raised pattern was carved on, and then the dye was embossed onto the fabric. Changsha Mawangdui tomb of the Western Han Dynasty unearthed several pieces of printing and coloring yarn is the use of this printing and dyeing method, and is combined with hand-colored printing and dyeing products. Patterns are mostly dogwood pattern, usually printed with convex plate branches and vines skeleton, and then hand-dyed stamens, flowers and leaves. (2) Folder dyeing is intaglio printing, with two thin wooden boards carved into the same pattern, the fabric will be sandwiched between the two boards, the openwork pattern at the brush with dyes. (3) Batik. The technique of batik in the southwest of China has a long history, dating back to the Han Dynasty. First, the melted wax in the white fabric to draw patterns, and then people dye, mainly blue, after the wax to show the white flowers, to get the blue ground white flowers prints and dyes.