Ink, ink jet recording method using the same and recording equipment containing the ink
AssigneeCanon Kabushiki Kaisha
InventorsMakoto Aoki, Yoshihisa Takizawa, Yutaka Kurabayashi
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Abstract
An ink including a dye; a liquid medium for dissolving the dye; and a polymer, wherein the surface tension and the viscosity of the ink respectively are 26.times.10.sup.-5 N/cm to 40.times.10.sup.-5 N/cm and 0.7.times.10.sup.-3 Pa.multidot.s to 12.times.10.sup.-3 Pa.multidot.s, and the forward contact angle with respect to a recording medium, on which an image will be printed, ranges from 60.degree. to 180.degree. at 25.degree. C. An ink jet recording method and recording apparatus employing the ink are also disclosed.
Claims28
A method of decreasing bleeding in ink jet recording comprising the steps of:
- (1) selecting an ink consisting essentially of
- a water-soluble dye;
- a liquid medium for dissolving said dye;
- an alkali-soluble styrene-acrylic acid copolymer;
- and
- a solvent selected from the group consisting of thiodiglycol, sulforane and dimethylsulfoxide;
- and
- a solvent for improving fixation, wherein
- a surface tension and viscosity of said ink respectively are 26.times.10.sup.-5 N/cm to 40.times.10.sup.-5 N/cm and 0.7.times.10.sup.-3 Pa.multidot.s to 12.times.10.sup.-3 Pa.multidot.s, and a forward contact angle with respect to a recording medium, on which an image will be printed, ranges from 60.degree. to 180.degree. at 25.degree. C.;
- (2) jetting a plurality of droplets of said ink to the recording medium;
- and
- (3) forming an image on the recording medium with said plurality of droplets, wherein each droplet has a D/h ratio of not less than 6, where D is the diameter of the droplet and h is the penetration distance of the droplet in a direction of the depth of the recording medium.
A method of decreasing bleeding in ink jet recording comprising the steps of:
- (1) selecting an ink consisting essentially of
- a water-soluble dye;
- and
- a liquid medium for dissolving or dispersing said dye, where said liquid medium comprises (a) an alkali-soluble styrene-acrylic acid copolymer comprising 0.01 to 5.0% by weight of the overall weight of said ink, (b) a basic substance, (c) a polyhydric alcohol, (d) a solvent selected from the group consisting of thiodiglycol, sulforane and dimethylsulfoxide, (e) water, and (f) a solvent for improving fixation, wherein a surface tension and a viscosity of said ink respectively are 26.times.10.sup.-5 N/cm to 40.times.10.sup.-5 N/cm and 0.7.times.10.sup.-3 Pa.multidot.s to 12.times.10.sup.-3 Pa.multidot.s, and a forward contact angle with respect to a recording medium, on which an image will be printed, ranges from 60.degree. to 180.degree. at 25.degree. C.;
- (2) jetting a plurality of droplets of said ink to the recording medium;
- and
- (3) forming an image on the recording medium with said plurality of droplets, wherein each droplet has a D/h ratio of not less than 6, where D is the diameter of the droplet and h is the penetration distance of the droplet in a direction of the depth of the recording medium.
A method of decreasing bleeding in ink jet recording comprising the steps of:
- (1) selecting an ink consisting essentially of
- a water-soluble dye;
- and
- a liquid medium for dissolving or dispersing said dye, said liquid medium comprising (a) an alkali-soluble styrene-acrylic acid copolymer comprising 0.01 to 5.0% by weight based on the total weight of said ink, (b) a basic substance, (c) a glycol comprising 1 to 50% by weight based on the total weight of said ink, (d) sulfur-containing organic solvent comprising 1 to 50% by weight based on the total weight of said ink, (e) water, and (f) a solvent for improving fixation, wherein a surface tension and a viscosity of said ink respectively are 26.times.10.sup.-5 N/cm to 40.times.10.sup.-5 N/cm and 0.7.times.10.sup.-3 Pa.multidot.s to 12.times.10.sup.-3 Pa.multidot.s, and a forward contact angle with respect to a recording medium, on which an image will be printed, ranges from 60.degree. to 180.degree. at 25.degree. C.;
- (2) jetting a plurality of droplets of said ink to the recording medium;
- and
- (3) forming an image on the recording medium with said plurality of droplets, wherein each droplet has a D/h ratio of not less than 6, where D is the diameter of the droplet and h is the penetration distance of the droplet in a direction of the depth of the recording medium.
Dependencies are inferred from the claim text.