20pcs Full Range 1-14 pH Test Paper Strips Litmus Testing Indicator Cutlery You may also like 40x

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20pcs Full Range 1-14 pH Test Paper Strips Litmus Testing Indicator Cutlery You may also like 40xITEM NAME: 20pcs Full Range 1 14 pH Test Paper Strips Litmus Testing Indicator img *{margin: 0; padding: 0;. The smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. PH 1 14 universal indicator papers for alkaline acid tests. PH Color Chart Intervals: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.