| http://www.w3.org/ns/prov#value | - Generally particulate conductive particles which are suitable for use in the invention have an average particle size, i.e., the size of the primary particle, of less than 1 ??m, preferably less than 0.5 ??m, particularly less than 0.1 ??m, e.g. 0.01 to 0.09 ??m.
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