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ASTM D612

ASTM D612 is a test method for determining the oil content in paraffin wax and related petroleum waxes using a refractive index measurement.

 

Description of ASTM D612 (paraffin wax)

  • Property measured: Oil content
  • Material: Paraffin wax, microcrystalline wax, petroleum waxes
  • Principle: Refractive index
  • Result: Mass percent (%) oil

How the method works (conceptually)

 

  • The wax sample is melted under controlled conditions
  • The refractive index of the molten wax is measured
  • The oil content is calculated from calibration data relating refractive index to oil concentration

The presence of oil changes the refractive index of the wax, allowing the oil level to be quantified.

The ASTM D612: 

  • Is used for fast and repeatable for refined paraffin waxes
  • Suitable for low oil contents
  • Common in wax quality control and specification testing

Typical applications are fully refined paraffin wax, semi-refined paraffin wax, wax used for candles, packaging, cosmetics, and coatings.

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