Royal reminds me of cigarettes from the 1960s/70s. It's slightly woody with a straight on flavour, not smooth or complicated.
I would suggest just a couple of drops per ml and see how that goes for you, flavour intensity is a personal preference and can be affected by the equipment you are using.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.