| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a PC board capable of easily manufacturing the board having a beautiful surface of a base material such as a tile or the like. SOLUTION: The method for manufacturing the PC board comprises the steps of covering a front surface of the base material such as the tile or the like with a water soluble and acid protective agent such as an arabic gum or the like, and manufacturing the board of the base material. In this case, after a placed concrete is cured, the cured concrete is released from a form, autoclave cured, then washed to wash away the protective agent such as the arabic gum or the like. In the case of the gum, the gum can be simply washed away even by an ambient temperature water.
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