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The Use of Toner-Toner Charge Spectra to Generate a Pigment Triboelectric Series

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A triboelectric series orders a set of materials by the sign of the charge of each material when one is rubbed against the other. This can be done for toners by placing two toners of interest in a small vial, mixing them vigorously, and then sampling the mixture in a charge spectrograph. Almost invariably the toners charge against one another, and some separation is observed in the charge spectra. If the toners differ only in pigment, the relative charge of the toners should indicate the relative charge of the pigments. This has been done for a set of typical pigments melt blended into a polyester resin. Mixing all possible combinations of two toners leads to a self consistent ordering of the pigments. When the process is repeated after a silica surface additive has been blended onto the individual toners, a self consistent triboelectric series can again be generated; however, the ordering is different from that generated from the unblended toners. Ordering the toners by the charge level generated when each is mixed with a polymethylmethacrylate coated carrier generates yet another ordering of the pigments. Possible reasons for the variation in triboelectric ordering will be discussed.

Document Type: Research Article

Publication date: 2000-01-01

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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