3 Review(s)

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. Note: This paper does not apply to buffer solutions and very weak acid-base solution concentration lower than 0.01%. The test strip colour changes must be matched with the pH scale colour chart within about 15 seconds.