two packs of PH1-14 test papers

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.

Features:

High accuracy pH test paper, pH range from 1-14 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.

Note: CAN NOT indicate the Acid or alkali solution when its density was lower than 0.01%