Each roll contains a one-half inch wide by 50 foot long roll of test paper. The test paper is shipped in a protective plastic dispenser with a color chart. To use, simply tear off a small strip of the test paper, and either dip the paper into the test solution or place in contact with the surface to be tested. In the presence of water, the paper turns a bright lavender. The rolls have a two year shelf life if stored closed out of direct sunlight and heat in temperate space.
Please Note: Always use the instructions and color charts packaged with the product. Do not rely on your computer screen or printer to accurately render colors from charts provided online.