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Method and compositions for authenticating a product or document

  • US 5,786,509 A
  • Filed: 09/27/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 05/31/1995
  • Status: Expired due to Fees
First Claim
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1. A composition for use as an activator for a leucodye, wherein the activator is wet micronized and comprises at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups.

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