Last Updated:2025/11/20

Before pouring the soap mixture into molds, he tested the concentration of the lye with pH strips to ensure it was safe.

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Before pouring the soap mixture into molds, he tested the concentration of the lye with pH strips to ensure it was safe.

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石鹸の液を型に注ぐ前に、彼は木灰から抽出したアルカリ溶液の濃度をpH試験紙で確認して、安全であることを確かめた。

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