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AssigneeCanon Kabushiki Kaisha
InventorsTokuya Ohta, Yasuhiro Yano, Yohji Matsufuji, Masahiro Haruta, Tsuyoshi Eida
Estimating the term…
In an ink-jet recording process which comprises forming droplets of an ink and recording on an image receiving material by using the droplets, said ink is prepared by dispersing fine particles of pigment into aqueous dispersion medium containing polymer having both a hydrophilic and a hydrophobic construction portion. An average particle size (D micron) of the pigment and an average molecular weight of the polymer satisfy the relationship represented by the following equation. D.times.5.times.10.sup.2 .ltoreq.W And the ratio of molecular weight of the pigment to average molecular weight of the polymer is a value in the range from 1:2 to 1:150.
An ink-jet recording process which comprises forming droplets of an ink and recording on an image receiving material by using the droplets, said ink being prepared by dispersing fine particles of pigment into an aqueous dispersion medium containing a polymer which has both an ethylenically unsaturated carboxylic acid substituent as a hydrophilic portion and an aromatic ring substituent as a hydrophobic portion and an average molecular weight sufficient to contribute to the dispersion stability of said pigment particles without increasing the viscosity of the ink higher than about 20 cps and wherein said hydrophilic portion constitutes from 2 to 40 weight percent of said polymer.
Dependencies are inferred from the claim text.