Invert the brush head and inject glue into it. When injecting glue, select the design for glue and thinner, the amount of glue and the infiltration time of glue shall be according to the size of the brush, the length of the hair and the shape of the tube. This step requires skills: the hair can’t be glued down with less glue, or a waste product may appear if too much glue is added. There are Chinese domestic glue and imported glue. We use imported glue from South Korea for Texamo make-up brush and this glue has high concentration, good viscosity and strong sealing effect and smells less. After the glue is completely dry for two days, apply glue again to effectively prevent hair loss.