Artifact Restoration - Uses for Supercritical Fluids

Use Supercritical Fluids to Restore Artifacts


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 and viscosity and transport properties become limiting factors with traditional restoration methods.


Subcritical Water Treatment


  • Remove very high levels of Cl - from the samples in very short periods of time.
  • Dramatically shorter treatment time
  • Subcritical water - 5 days
  • Conventional - over 6 months
  • NaOH or Na2CO3 alone sometimes not effective
  • Results in the transformation of ß-FeOOH into other iron oxides
  • Specimens maintain their physical appearance, mechanical properties
  • Maintain corrosion resistance (even those stored in a saturated water vapour chamber for at least 2 years)

Applied Separations have a proven commitment to advancing Supercritical Fluids technology and have worked with companies all over the world to incorporate supercritical fluid extraction (SFE) into their processes. Thanks to their world class R&D team, in-house engineers, and visionary approach, Applied Separations work hard to develop and enhance applications of this green technology in many unexpected industries.


Have an application in mind? Please contact iBiosys Solutions and, together with Applied Separations, we will work with you to develop a supercritical fluid application fit for your needs.