濕度指示卡

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濕度測量卡浸有氯化鈷溶液,該溶液經過仔細混合,顏色從藍色到不同深淺的洋紅色、紅色再到粉紅色。這些標籤不是精確的指標(只是相對的)。然而,他們非常擅長告訴您包裝和容器中可能的最大水分含量。


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