paper size: 45mm x 7mm (L x W), 3 packs < / p > < p > The test strip color change should match the pH scale color chart in about 15 seconds. The discoloration range varies with pH content by comparing the color map ratio: the smaller the value, the stronger the acidity, the larger the value, the stronger the alkalinity < / p > < p > do not immerse the pH strip in the test solution. This may cause test results to be displayed incorrectly. Drop the test solution onto the ph test sheet. It will perfectly indicate which substances are really acidic or alkaline < / p > < p > There is a strong correlation between the pH of the internal environment of the body and the pH paper which helps you to stay healthy by testing many common substances, including moisturizing soap, lemon juice
