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Color shifting film glitter

  • US 6,475,609 B1
  • Filed: 07/05/2000
  • Issued: 11/05/2002
  • Est. Priority Date: 01/13/1998
  • Status: Expired due to Fees
First Claim
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1. Glitter particles comprising film comprising alternating layers of at least a first and second polymeric material, wherein at least one of said first or second polymeric materials is birefringent, wherein the difference in indices of refraction of said first and second polymeric materials for visible light polarized along first and second axes in the plane of the layers is at least about 0.05, and wherein the difference in indices of refraction of said first and second polymeric materials for visible light polarized along a third axis mutually orthogonal to said first and second axes is less than about 0.05.

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