Specifications:

Take accurate alkaline/acid tests with this pack of 160 litmus paper strips.
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PH 1-14 color chart in each pack.
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The test strip color changes must be matched with the pH scale color chart within about 15 seconds.
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Suitable for urine, saliva, drinking water, etc.
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The Scale Reads from 1 to 14:
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1 – 3 indicates a very acidic substance.
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4 – 6 indicates an acidic substance.
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7 indicates neutral.
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8 – 11 indicates alkalinity.
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12 – 14 indicates a very high level of alkalinity.
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Instructions:
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Simply press the testing strip to the object or liquid you are testing.
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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.
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Keep dry for the rest paper.
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Type: PH Test Paper
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Quantity: 2 Books
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Features: Indicator Paper, Universal, Full Range
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Package Size: 7cm x 4.5cm/2.76" x 1.77" (Approx.)
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Notes:
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Can not indicate the acid or alkali solution when its density was lower than 0.01%.
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Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
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Please allow slight dimension difference due to different manual measurement.
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Package Included:
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2 Books of PH Test Paper(160Strips)