Recording liquid

Abstract

Abstract PURPOSE: To provide a recording liquid having excellent discharging stability, shelf stability and printed image characteristics (density, definition, water resistance, light resistance), by blending, as a recording agent, a water-soluble blue dye and a blue pigment in combination. CONSTITUTION: A mixt. of a water-soluble dye (a) (e.g. C.I. Direct Blue 25) and a blue pigment (b) (e.g. C.I. Pigment Blue 15) in a weight ratio of 10:1W1:10, is used as a recording agent, both dye and pigment being represented by CIE standard chromaticity diagram within dominant wavelength: 480±20nm, excitation purity: 60±5% and brightness: 34±5%. 1W20wt% (based on the total amount of recording liquid) above recording agent (A), a high-molecular dispersant (B) (e.g. polyvinyl alcohol having a MW of 1,000W100,000), and water (C) (which may be used together with a water-miscible org. solvent such as ethylene glycol), are blended together. The mixt. is adjusted so as to give a viscosity of 1W20cps to produce a blue recording liquid. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Takeshi Sakaeda
• 👤 Yasuhiro Yano
• 👤 Yoji Matsufuji
• 👤 Masahiro Haruta
• 👤 Noriya Oota

Bibliographic Details