❤Appropriate for testing alkaline or acid level of any liquid.★
❤The test strip color changes must be matched with the pH scale color chart within about 15 seconds.★
❤Great product to have in every lab and at home to measure and inspect water quality, makeup, saliva, soil, alkaline diet, food and more.★
❤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.★
❤Can not indicate the Acid or alkali solution when its density was lower than 0.01%.★
