WALRONT 1 Set 80 Strips Full Range pH Alkaline Acid 1-14 Test Paper Water Litmus Testing Kit
$ 7.34
11.Simply press the testing strip to the object or liquid you are testing. Half second later, take out the paper and using the color chart included, compare the color change of the paper to find out the acidity level of your testing subject. 2Can not indicate the Acid or alkali solution when its density was lower than 0.01%. 3Keep dry for the rest paper. 4 5
