A quick guide to performing this test
- Wait at least 20 minutes after drinking alcohol before taking the test.
Procedure:
- Squeeze both ends of the tube firmly and push to tear the protective film.
- Take a deep breath and blow into either end of the tube 2 times for 10 seconds each.
- After 2-4 minutes, compare the result (colour of the material) with the colour scale on the packaging.
