| http://www.w3.org/ns/prov#value | - In embodiments, one or more sets, for example one to ten, such as one to tour or two to four sets, of the colored particles incorporated into the display medium comprise particles, for example emulsion aggregation particles such as emulsion aggregation polyester or emulsion aggregation acrylate particles, surface treated with a cationic polymer that imparts a substantially uniform positive charge
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