| 摘要 |
PURPOSE: A washbowl manufacturing method and a bathtub are provided to restrict aging, to relieve fatigue, and to make heads of users clear by tannin of pine needles embedded in the bathtub. CONSTITUTION: A washbowl manufacturing method for producing a bathtub by injecting and solidifying materials into a mold(10,11) having a space for receiving the water is composed of steps for coating the inner surface of the mold with gel coat(13) at the predetermined thickness; settling pine needle powders(20) on the coated upper surface of the mold; injecting a mixture(30) of polyester, a hardening agent, and an agent to be solidified on the upper part of the settled pine needle powder; and removing the mold after solidifying the mixture. Charcoal and loess are additionally placed on the coated upper surface.
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