3 Pack 240pcs PH 1-14 Test Paper Litmus Test Strips Universal Indicator Test Paper for Water Saliva Pool Aquarium Urine Soil Testing

The test strip color changes must be matched with the pH scale color chart within about 15 seconds. Different pH content discoloration range is different, by comparing the color card ratio: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. Please do not dip the PH strips in the test liquid. It might lead to incorrectly showing the test results. Please drop the test liquid on the PH strips. It will perfectly indicate the real acidic or alkalinity substance. There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain a good healthy body by testing many usual substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat, etc