摘要:
A recording material is disclosed, comprising a colorless or pale solution containing an electrolyte, a water-soluble organic solvent and water, and an ink containing a pigment, an anionic compound, a water-soluble organic solvent and water, wherein the number of particles of 0.5 &mgr;m or more present in 1 L of the recording material is 1×1011 or more, and the number of particles of 5 &mgr;m or more is 1×109 or more. Also disclosed is an image forming method using the recording material.
摘要:
In an aqueous ink jet recording liquid including at least water, a water-soluble organic solvent and a water-insoluble coloring material, (1) the absolute value of the zeta potential is 20 mV or more, (2) the conductivity is from 0.05 to 0.75 S/m, (3) the number average particle size of dispersed particles is from 15 to 200 nm, and (4) the number of particles having a particle size of 0.5 &mgr;m or more present in one liter is 2.5×1011 or less. Due to the aforementioned, dispersion stability of the coloring material can be maintained in the ink jet recording liquid in which the water-insoluble coloring material is dispersed, and the aqueous ink jet recording liquid is provided, which is excellent regarding stability over long periods of time, causes no ink flow route clogging and prevents kogation in printing, provides a recorded material having excellent rub resistance, printing quality, optical density, water resistance and lightfastness, and can prevent uneven density.
摘要:
Disclosed is an ink for ink jet recording comprising water, a water-soluble organic solvent, a pigment and a dispersant, wherein the dispersant has a hydrophilic moiety and a hydrophobic moiety and comprises a copolymer obtained by copolymerizing from 40 to 80 mol % of a monomer having an &agr;,&bgr;-ethylenically unsaturated group constituting the hydrophilic moiety and from 20 to 60 mol % of a monomer having an &agr;,&bgr;-ethylenically unsaturated group constituting the hydrophobic moiety.
摘要:
Disclosed is an ink jet recording ink comprising water, an aqueous organic solvent, a surfactant and a self-dispersible pigment, wherein the number average particle diameter of dispersed particles of the pigment is from 15 to 100 nm, given that mv is the volumetric average particle diameter of the dispersed particles of said pigment and mn is the number average diameter of the dispersed particles of said pigment, mv/mn is less than or equal to 3, the number of particles having a particle diameter greater than or equal to 0.5 .mu.m among the dispersed particles of the pigment contained in one liter of the ink is less than or equal to 7.5.times.10.sup.10, the surface tension of the ink is less than or equal to 60 mN/m, the electroconductivity of the ink is from 0.05 to 0.4 S/m and the pH of the ink is from 6 to 11. This ink provides a high storage stability and a uniform image having high water-resistance, resolution, and density can be obtained.
摘要:
A recording apparatus including: an intermediate transfer member; an image forming composition layer formation unit that supplies an image forming composition to the intermediate transfer member, the image forming composition containing a curable material that cures upon application of an external stimulus; an ink application unit that applies ink to the image forming composition layer that has been formed on the intermediate transfer member; a transfer unit that transfers the image forming composition layer from the intermediate transfer member to a recording medium by contacting the image forming composition layer onto which the ink has been applied with the recording medium; and a first stimulus application unit that applies a stimulus to the image forming composition layer that cures the image forming composition layer, the stimulus being applied at least one of immediately before the image forming composition layer comes into contact with the recording medium, or during the contact.
摘要:
A recording apparatus including: an intermediate transfer member; an image forming composition layer formation unit that supplies an image forming composition to the intermediate transfer member, the image forming composition containing a curable material that cures upon application of an external stimulus; an ink application unit that applies an ink to the image forming composition layer that has been formed on the intermediate transfer member; a transfer unit that transfers the image forming composition layer from the intermediate transfer member to a recording medium by contacting the image forming composition layer onto which the ink has been applied with the recording medium; and a first stimulus application unit that applies a stimulus to the image forming composition layer that cures the image forming composition layer, the stimulus being applied at least one of immediately before the image forming composition layer comes into contact with the recording medium, or during the contact.
摘要:
A multicolor ink set includes a black ink including at least a water-insoluble coloring material in which a carboxylic acid structure or a carboxylate salt structure is exposed to the surface, water, and a water-soluble organic solvent, and having a surface tension at 20.degree. C. of from 30 to 60 mN/m, and a color ink including at least one or more water-soluble coloring material selected from cyan, magenta and yellow, water, and a water-soluble organic solvent, having a surface tension at 20.degree. C. of from 20 to 50 mN/m and lower than that of the black ink, and 50% by weight or more of the water-soluble coloring material has a solubility in water at 20.degree. C. of 10% by weight or less.
摘要:
An ink jet recording ink comprising water, a coloring material, a water-soluble organic solvent and a plurality of dispersants each having a different HLB, and an ink jet recording method using this ink jet recording ink are disclosed. Preferably, given that respective HLBs of n (n.gtoreq.2) kinds of dispersants are such that HLB.sub.1
摘要:
The present invention provides an ink unit for use in an ink jet recording which can provide color images with high water resistance, no print bleeding, and an excellent color reproduction of shades, together with rub resistance, and also can render color images on ordinary paper clearly and stably, and an ink jet recording method using the ink unit, wherein the ink, unit which has a black ink and a color ink, comprises pigments, a polymeric dispersant, and water, wherein a black ink contains a black pigment and a first polymeric dispersant including a COOH group or the salt thereof (acrylic acid salts, methacrylic acid salts, and the like) and a color ink contains a chromatic pigment and a second polymeric dispersant including a SO.sub.3 H group or the salt thereof (vinyl sulfonic acid salts, naphthalene sulfonic acid salts, and styrenesulfonic acid salts).
摘要:
An ink jet recording ink comprising water, a coloring material such as carbon black, (a) a dispersant containing at least one of a sulfonic acid group, sulfuric ester, and salt thereof, such as a polystyrenesulfonate polymer, and (b) a dispersant above-mentioned dispersants is preferably from 0.1 to 20 parts by weight based on 10 parts by weight of the coloring material. Further, the pH, surface tension, and viscosity of the ink are preferably from 7.0 to 10.0, from 30 to 65 mN/m, and from 1.0 to 10.0 mPa.multidot.s, respectively. Dispersion stability for a long period of time is improved, kogation in the thermal ink jet method is prevented, and excellent fixation on paper is obtained containing a carboxyl group or salt thereof, such as a styrene-maleate polymer, wherein the ratio by weight of (a) to (b) is from 1:5 to 1:100.