| 摘要 |
PROBLEM TO BE SOLVED: To prevent the corrosion of piping of a water-closet bowl, etc., by applying an organic component dissolving agent to the water-closet bowl stuck with urinary calculi and rubbing the portions coated with the organic component dissolving agent by using a brush several minutes after, thereby removing the urinary calculi. SOLUTION: The organic component dissolving agent 5, such as the orange consisting essentially of limonene which is the natural extraction liquid for dissolving the organic components 3 among the organic components 3 and inorganic components 4 constituting the urinary calculi 1 and N-methylpyrroldine, is applied by spraying, etc., to the water-closet bowl 2 stuck with the urinary calculi 1 in an organic component dissolving agent coating application stage 6. After several minutes of the organic component dissolving agent coating application stage 6, a brush treatment stage 8 of removing the urinary calculi 1 by rubbing the portions coated with the organic component dissolving agent 5 by using the brush is executed, by which the urinary calculi 1 are removed from the water-closet bowl 2. As a result, the corrosion of the piping of the water-closet bowl 2 does not occur and the method is pollution-free.
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