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HAND HELD PHOTOCHROMIC MARKING IMPLEMENT

  • US 20100254747A1
  • Filed: 06/16/2010
  • Published: 10/07/2010
  • Est. Priority Date: 12/20/2005
  • Status: Active Grant
First Claim
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1. A solid hand held direct marking crayon implement comprising:

  • a handle portion for gripping said direct marking crayon implement comprising a solid phase carrier material and a photochromic colorant which is a solid phase; and

    at least one direct marking crayon portion comprising a solid phase carrier material comprising (a) at least about 20% by weight, based on the weight of the carrier material, of at least one low polarity wax, (b) a dye solubility agent and (c) a photochromic colorant comprising at least one of bisimidazole compounds, bis-tetraphenylpyrrole compounds, aryl disulfide compounds, stilbene compounds, aromatic azo compounds, and mixtures thereof, which is a solid phase, and which is soft enough to write a colored carrier material directly onto a selected media, at ambient temperature.

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