This item has 4 indication that has accurate measurement and it is widely used in medical research, laboratory, hospital, home and even human body. 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 0 to 14:
0 – 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 0-14 color chart in each box
1.Simply press the testing strip to the object or liquid you are testing. Half second later, take out the paper and using the color chart included, compare the color change of the paper to find out the acidity level of your testing subject.
2.Can not indicate the Acid or alkali solution when its density was lower than 0.01%