Patent ID: 7589331

Claim:
A kit for measuring the dosage of UV-C radiation to which an article has been exposed, said kit comprising: a. a UV-C dosimeter comprising a substrate having a plurality of discrete UV-C sensitive compositions coated thereon and wherein said plurality of UV-C sensitive compositions includes a first UV-C sensitive composition that undergoes a color change in response a UV-C dosage of 200 mJ/cm 2 or greater, a second UV-C sensitive composition that undergoes a color change in response a UV-C dosage of 400 mJ/cm 2 or greater, and a third UV-C sensitive composition that undergoes a color change in response a UV-C dosage of 800 mJ/cm 2 or greater; and b. a UV-C dosage reference card having a first reference pattern having four discrete color marks that correspond to a UV-C dosage of 0 mJ/cm 2 , a second reference pattern having four discrete color marks that correspond to a UV-C dosage of at least 200 mJ/cm 2 , a third reference pattern having four discrete color marks that correspond to a UV-C dosage of at least 400 mJ/cm 2 , and a fourth reference pattern having four discrete color marks that correspond to a UV-C dosage of at least 800 mJ/cm 2 or greater, wherein the UV-C dosimeter can be compared to one or more of the reference patterns of the UV-C dosage reference card to determine a relative level of UV-C radiation to which the UV-C dosimeter may have been exposed.