- Precise precise color matching. The color chart has pH matches at 3.8, 4.1, 4.4, 4.6, 4.8, 5.1, 5.4
- Color chart clean measurement and clear results cost-effective and easy to use.
- The test strip color changes must be matched with the PH scale color chart within 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.
- Keep the rest paper dry for storage.
Please do not dip the PH strips in the test liquid. It might lead to incorrectly showing test result. Please drop the test liquid on the PH strips. It will perfectly indicates the real acidic or alkalinity substance.