Chlorine / Bleach Test Paper This Chlorine Test Paper provides a simple, reliable, and economical means to measure the concentration of free available chlorine in sanitizing solutions. The Chlorine Test Paper measures total available chlorine from 10-200ppm and gives results in just seconds. Total available chlorine is the sum of free available chlorine and the combined available chlorine. Our chlorine test paper is most often used to test the strength of solutions used to sanitize surfaces, for example, in the restaurant industry. In these types of applications, bleach is usually used to generate the available chlorine. When using bleach as a cleaner, it must be diluted before use, and it will work best in the pH range of 5-7. Instructions: 1. Use dry fingers to remove a chlorine test paper strip from the vial. 2. Dip the test strip into the solution to be tested, and do not agitate. 3. Remove and compare to the color chart immediately. NOTE: The strip will darken over time, so it is best to compare to the color chart as directed. In addition, if two strips are stuck together, the color will be darker. Lastly, if you lay the strip against the vial when comparing to the color chart, it will also darken the color. The color chart was created by holding a strip in the air next to the vial. IMPORTANT NOTE: This strip was designed specifically for restaurants to test chlorine sanitizers in three part sinks. It will work for testing anything in the range of 10-200 PPM. IT WILL NOT work for testing tap water, pool water, undiluted bleach, or anything that uses Quaternary Ammonia as the active ingredient. If you have questions about your application, please message us and one of our experts will be happy to help!