Oil-based ink composition

An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10 when ions in the ink composition are transferred to water. This oil-b...

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Bibliographische Detailangaben
Hauptverfasser: TERASAWA, KANRYO, NISHIMOTO, TOMOHISA, DOBATA, MIYUKI
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10 when ions in the ink composition are transferred to water. This oil-based ink composition prevents corrosion of a nozzle plate and is improved in storage stability, and thus can ensure printer reliability such as ink-jet stability obtainable even after long storage thereof, and can withstand outdoor service environments.