Instructions: 1. Take one strip from the roll and dip it into the solution you want to measure. Strip color will change immediately. 2. Quickly match this color against the color chart on the surface of the pack to obtain the ph. Don't wait or let it dry 3. The number next to the color is your ph. The ph. scale ranges from 1 (very acidic) to 14 (very basic), 7 is neutral. Common uses and examples of ph. acid rain, ph. = 4.3 - 5.6 ammonia based glass cleaner, ph. = 10 battery acid, ph. = 1 beer, ph. = 4.5 bleach, ph. = 12.6 drain cleaner, ph. = 14 drinking water, ph. = 6.5 - 8.5 fruit juice, ph. = 2 - 5.5 gastric acid, ph. = 1.5 - 3.5 lemon juice, ph. = 2 milk, ph. = 6.8 milk of magnesia, ph. = 10.5 oven cleaner, ph. = 13 pure water, ph. = 7 saliva, ph. = 6.2 - 7.4 sea water, ph. = 8 soft drinks, ph. = 2 - 4 soap, ph. = 7 - 10 tea, ph. = 4.9 - 7.2 urine, ph. = 4.6 - 8 vinegar, ph. = 3.1.
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