Manufacturing method of the reflector

A manufacturing method of a reflector which reflects and focuses light of a light source in LED illumination equipment, the manufacturing method comprising:

• (a) injecting a plastic injection product through a mold having an inner surface which is subject to a lapping process;
• (b) cleaning a surface of the plastic injection product with an ultrasonic wave to remove foreign substances;
• (c) performing a plasma surface treatment to improve adhesiveness of the plastic injection product cleaned with the ultrasonic wave, the step (c) comprising
• (c1) performing a plasma surface treatment;
• and
• (c2) performing undercoating which is formed as an antistatic layer on the plastic injection product which is subject to the plasma surface treatment;
• (d) depositing an aluminum thin film above the plastic injection product;
• and
• (e) performing top coating which is formed as an antistatic layer, on the plastic injection product on which the aluminum thin film is deposited,
• wherein a thickness of a undercoating layer is larger than a thickness of a top coating layer, and
• wherein a composition for the undercoating includes 40 wt. % to 50 wt. % of a conductive polymer, 5 wt. % to 10 wt. % of an organic solvent, 5 wt. % to 10 wt. % of a binder resin, and 35 wt. % to 50 wt. % of water and a composition for the top coating includes 10 wt. % to 30 wt. % of a conductive polymer, 5 wt. % to 10 wt. % of an organic solvent, 5 wt. % to 10 wt. % of a binder resin, and 55 wt. % to 75 wt. % of water.