| http://www.w3.org/ns/prov#value | - In this method, the absorption component can be Schott filter glass, graphite, carbon, a metal oxide, an acrylate polymer, or a urethane polymer. [0024] The methods can be used to mark a variety of tissues including skin, iris, sclera, dentin, fingernails, toenails, tissue beneath fingernails, tissue beneath toenails, tissue inside the mouth, and tissue lining internal body passages.
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