The oil or solvent content of a wax may   have significant effects on several of its properties, such as strength, hardness, flexibility, scuff resistance, coefficient of friction, coefficient of expansion, melting point, and oil straining.
The importance of these effects may be dependent upon the ultimate use of the wax.

The sample is dissolved in methyl ethyl ketone, the solution cooled to -32°C (-25°F) to precipitate the wax, and filtered.
The oil content of the filtrate is determined by evaporating the methyl ethyl ketone and weighing the residue.

Oil & Solvent Content Test Equipment

to be composed of:

- Oil & Solvent Content of Petroleum Wax Apparatus
  (with Dewar cooling-bath or circulator-bath)