Feamos 80 Strips Full pH 1-14 Test Indicator Paper Litmus Testing Kit There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain good healthy body by testing many usual everyday substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat...etc The scale reads from 1 to 14:1 - 3 indicates a very acidic substance ,4 - 6 indicates an acidic substance ,7 indicates neutral ,8 - 11 indicates alkalinity ,12 - 14 indicates a very high level of alkalinity PH 1-14 color chart in each pack The test strip color changes must be matched with the pH scale color chart within about 15 seconds Paper Size:59mm x 8mm (L x W)