Use Test Paper to check the validity of disinfectant.
Size：20mm x 7mm
How to use：
1. Cut a small piece of test paper
2. Drop 1 - 2 drops of disinfectant on test paper
3. If disinfectant is valid, the test paper will change to blue . After 1-2 mins, it will turn back to white.
4. If disinfectant is invalid, the test paper will remain unchanged.
5. The test paper cannot be resued.
・Store at cool place and away from sunlight.