very small

[The Efficacious Gentleman]

Not really - although once the recipe is signed off you can use it (unchanged, of course) no worries. So if you get 1 recipe signed off and sell it for the next 10 years, even if it sells very badly it can still make the costs back.

But of course you need to be selling enough to cover costs of insurance and so on, too.

 

[Saponista]

I had a similar situation with a blend if tea tree and some other essential oils, it smelled ok at first bit after it had cured I hated it, it smelt awful.