| 摘要 |
PROBLEM TO BE SOLVED: To provide a bathtub which is not slippery to hardly cause accidents such as falling down, etc., without harming design and appearance. SOLUTION: The upper edge face or both the upper edge face and the bottom face of this bathtub is/are formed of a water repellent surface with a contact angle with water not lower than 90 deg. and the inner wall face is formed of a hydrophilic surface with a contact angle with water not higher than 90 deg.. |
