ITEM NAME:New Universal 160 Full Range 1-14 pH Test Paper Strips Litmus Testing Kit N #gib Store Home Promotion Hot Item Add to Fav.The test strip color changes must be matched with the pH scale color chart within about 15 seconds. 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.
