Solution color indicators. Blue to indicate acids, red for alkalies.
100 pieces per pack
Instructions on use of Litmus Paper: Two types of pH paper are commonly used. Litmus paper is indicator paper coated with organic dye which changes color in the presence of acids and bases. Red litmus paper is used to check for bases, blue litmus paper is used to check for acids. First, choose the appropriate type of paper. Then test the solution with the paper. Do Not dip the pH paper into the solution. Take a dropper and add the solution to the litmus paper. Blue litmus paper will turn red in the presence of an acid, while red litmus paper will turn blue in the presence of a base.
Caution: Please use safety glasses and all appropriate safety equipment such as gloves and a lab apron when dealing with known and unknown solutions.