Cover spot with a large flat stone or dogs etc. This is done with meats, mice etc. to turn them to liquid. It is more often done in normal light, and temperature such as in a shed. Provide for gas escape and prevent maggots from entering. This can be done with musks and glands and is important with beaver castor and deer musk.
Many botanicals are in tinctures.
For lures only pure grain alcohol is used. Perhaps its more like cooking where nothing but long experience can guarantee results. The following formulas do not have to follow rigid weights or measures, they are all variable to some extent and if the lure maker has a talent for it he can tell when overbalance occurs or when something is just not right. Sometimes called fish juice as it does not always form a nice oil. It is of course attractive to most fur bearers and forms a base for some lures.