Adding camphor with camphor spirit
From volunge on the Snuffhouse forum, 2019
A way to give any snuff a camphor note, using camphor spirit (Spiritus Camphoratus) from a pharmacy. It's sold at 2% and 10% strength.
You'll need Tick as you go
Equipment
Method
Notes
That works out at about 20 mg of camphor per gram of snuff, close to what some European makers are said to use. The amounts are for the 10% spirit. Don't go stronger: camphor can be toxic in quantity.