How should 10 mL concentrated flavourings be diluted?

The 10 mL flavourings are classically used in a 10% blend, so they should be added to 90 mL of base.

Each consumer can dose as he or she likes, depending also on his or her system and the blend used. In the case of blends with a high VG content, it is recommended to use the flavourings at least at 15%.