Range - pH > 7
Colour change - Red Blue
Presentation - 10 books per pack. Each book has 20 strips
Litmus Red is one of the most essential and most widely used indicator papers in education, laboratories and chemical manufacturing. Litmus Red is used for testing the alkalinity of a solution where no precise pH value is required. A drop of the solution is placed on the paper and a colour change on the paper can then be clearly estimated. In the presence of alkali, the Litmus Red paper will change to blue.
Image is example only Johnson Test Papers Catalogue