Types of Finishes
There are three major types of finish :
- Evaporative
- Reactive
- Coalescing
Wax is an evaporative finish because it is dissolved in turpentine or petroleum distillates to form a soft paste. After these distillates evaporate, a wax residue is left over.
Reactive finishes use solvents such as white spirits and naphtha. Oil varnishes and linseed oil are reactive finishes, meaning they change chemically when they cure, unlike evaporative finishes. The solvent evaporates and a chemical reaction occurs causing the resins to undergo a change. This change prevents solvents from dissolving reactive finishes.
Tung oil and linseed oil are reactive finishes that cure by reacting with oxygen, but do not form a film.
Water based finishes generally fall into the coalescing category.
Read more about this topic: Wood Finishing
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