Preparation method of antibacterial composite pigment juice green based on high-energy ball milling method and freeze drying technology

The invention relates to the field of cultural relic protection, and discloses a preparation method of antibacterial composite pigment juice green based on a high-energy ball milling method and a freeze drying technology, and the preparation method comprises the following steps: 1) adding alum into a gelatin solution to obtain a gelatin-alum water compound solution A; 2) adding the radix sophorae flavescentis extracting solution, plant antibiotics, menthol, sodium dodecyl sulfate, 8-hydroxyquinoline, ethanol and glycerol into water, heating and stirring to obtain an antibacterial mixed solution B; 3) mixing the gelatin-alum water compound solution A with the antibacterial mixed solution B to obtain antibacterial gelatin-alum water C; 4) adding water into gamboge, indigo blue and cinnabar, performing ball milling, and performing freeze drying to obtain composite juice green pigment powder D; and 5) mixing and grinding the antibacterial gelatin alum water C and the composite juice green pigment powder to obtain