| http://www.w3.org/ns/prov#value | - The particles with a metallic glint which can be used in the invention are chosen in particular from: - particles of at least one metal and/or of at least one metal derivative, - particles comprising an organic or inorganic substrate, made of one or more material(s), at least partially covered with at least one layer with a metallic glint comprising at least one metal and/or at least one metal der
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