Premium PH Test Papers This pH test paper allows you to accurately test the pH of various substances including food, water/aquariums, soil, and much more. Each booklet contains a PH guide ranging from 1-14, with 1 being the most acidic and 14 the most alkaline. Ideal for testing pond water, home fish tanks and for use in food preparation and classroom projects FeaturesWHATS INCLUDED?; You will receive 2 booklets of litmus test paper each containing 80 testing stripsHOW TO USE; Follow the below simple instructions to ensure you accurately use your litmus testing strips Dip a litmus strip into the liquid, drip a sample of liquid onto a litmus strip, or press a litmus strip onto the damp sample to begin the test. 15 seconds to be matched with the pH scale color chart as follows: 1-3 Indicates a Highly Acidic Substance 4-6 Indicates an Acidic Substance 7 Indicates Neutral 8-11 Indicates an Alkaline Substance12-14 Indicates a Highly Alkaline Substance DIMENSIONS; Approximate size of pack 70 x 45mm Contains 2 x Litmus Test Paper Books