Supercritical fluid cleaning of banknotes and secure documents

Supercritical fluid cleaning of banknotes and secure documents

  • CN 104,918,720 A
  • Filed: 09/09/2013
  • Published: 09/16/2015
  • Est. Priority Date: 11/01/2012
  • Status: Active Application
First Claim
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1. clear up a method for secure file, this secure file comprises base material, vision data and security feature, and the method comprises:

  • Expose secure file supercritical fluid and continue for some time and be enough to clear up this base material and do not damage security feature and vision data at a temperature and pressure;

    Wherein clear up base material to comprise and remove one or more materials to supercritical fluid from base material.

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