Patent ID: 7758268

Claim:
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 1′3′-Dihydro-1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-(2H)-indole], 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-[3H]naphtha[2, 1-b][1,4]oxazine], 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.