- to treat (rubber) with sulfur and heat, thereby imparting strength, greater elasticity, durability, etc.
- to subject (a substance other than rubber) to some analogous process, as to harden it.
- to treat (rubber) with sulphur or sulphur compounds under heat and pressure to improve elasticity and strength or to produce a hard substance such as vulcanite
- to treat (substances other than rubber) by a similar process in order to improve their properties
