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pH Test Strips, pH 1-14 Litmus Paper pH Test Strips, Universal Indicator Litmus Test Paper, Acid Alkali Test Paper, pH Test Strips for Water, Soil, Cosmetic (10) 10 healthDE_Nov2023 [Function and application] : PeelingpH Test Strips, pH 1 14 Litmus Paper pH Test Strips, Universal Indicator Litmus Test Paper, Acid Alkali Test Paper, pH Test Strips for Water, Soil, Cosmetic (10) Do you know the acidity and alkalinity of substances? this ph strip is a measurement of the level of acid or alkali in a solution or substance. It turns red when it touches an acid and blue when it touche s an alkali. In the ph range of 1 to 14 a reading of below 7 shows an acid and of above