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iBiosys - Healthy World - Supercritical Fluid Extraction

SCF Industry Uses

Artifact Restoration

Artifact Restoration

Dramatically shorten treatment time.

The properties of supercritical fluids make it an ideal alternative to traditional artifact restoration techniques. Conventional methods are costly, time consuming and often damage the artifact.

For restoring metallic objects, use subcritical water. Subcritical water has a higher diffusion rate and a lower viscosity than water under ambient temperatures. Corrosion goes deep into the pores of the metal. Surface tension, viscosity and transport properties become limiting factors with traditional restoration methods.

Subcritical water treatment of artifacts:

Removes very high levels of Cl- from samples in very short periods of time.


Dramatically shortens treatment time;

  • Subcritical water - 5 days

  • Conventional - over 6 months

  • NaOH or Na2CO3 alone sometimes not effective


Specimens maintain their physical appearance and mechanical properties. 


Corrosion resistance is maintained (even samples stored in a saturated water vapour chamber maintain resistance to corrosion for at least 2 years).

For drying of organic artifacts, see critical point drying.

iBiosys - Artifact Restoration using Supercritical Fluids
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