The invention provides a preparation method for
colored glass beads; and the preparation method comprises the following steps of: after uniformly mixing SiO2
powder, CaO
powder, Na2O
powder, K2O powder, Al2O3 powder, ZnO powder and Sb2O3 powder, forming a batch material; pouring a glass liquid after the batch material is melted into water,
quenching the glass liquid in the water;
grinding water-quenched glass fragments to a particle size of 10-200 microns; and then nodulizing the
ground glass fragments in a bead forming furnace, so as to obtain a parent glass bead; pouring water,
glycerol and
dextrin into a
beaker; after uniformly mixing the water, the
glycerol and the
dextrin, adding a mixture to a mixture of AgNO3, CuCl, Cu2O, SnO, FeSO4.7H2O,
zinc powder and pulverized
coal; uniformly mixing the two mixtures; and ball-milling the mixtures so as to obtain a coloring
ion diffusion slurry for a
colored glass bead; and mixing the parent glass bead and the coloring
ion diffusion slurry so as to form a mixed material; pouring the mixed material into a stainless steel mold; heating the stainless steel mold to 550-650 DEG C; preserving the heat of the stainless steel mold for 5-10 minutes; and cooling the stainless steel mold so as to obtain
ion diffused and
colored glass bead. According to the invention, defects of single color, instable color, high production cost and the like in the traditional preparation method are avoided.