- PH 1-14 color chart in each package, total of 320 pieces of 4 Pack. - pH paper scales from 1 to 14: 1 - 3 is very acidic, 4 - 6 is acidic, 7 is neutral, 8 - 11 is alkaline, 12 - 14 is very alkaline. - Put cosmetic pH strips in the liquid. Read the result after about 15 seconds and compare it with the pH color chart. - pH strips help maintain your body healthy and can be used to test lemon juice, milk, soap, detergent, etc. - Universal use acid-base test strips for swimming pool water, cosmetics, school courses, and laboratories, etc.