Material: PET Packaging quantity: 100 PH range: 0 - 14, 4.5 - 9 Test duration: 15 seconds Feature: 1. Immerse the reaction area of the test strip into the solution to be tested for 1-2 seconds. Then remove the test strip and slide its edge along the mouth wall of the solution container to remove the excess water on top. 2. Within 1 minute, compare the reaction area of the test strip with the color of the color chart to determine the test value of the solution to be tested. 3. The optimal color comparison time should be controlled at 15 seconds. Exceeding or shortening this time will affect the reading. 4.pH test paper is suitable for various applications, such as assessing the body's acid-base levels in urine or saliva, analyzing drinking water, laboratory work, swimming pools and aquariums Note: 1. Based on actual usage effect. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. Package included: 1 *PH test strips