Fuji Xerox Co., Ltd.

Chizuru Koga

Kiyoshi Hosoi

Takashi Ogino

Tsukasa Matsuda

Takatsugu Doi

Toshiyuki Kasahara

Kouzou Ohta

A recording paper used for an electrophotographic system is provided, wherein, in a gas chromatograph generated using a headspace method by holding two pieces of the paper of dimensions about 1 cm&#xd7;about 1 cm at about 120&#xb0; C. for about 3 minutes, the quantity of aldehyde compounds generated having a straight-chain alkyl chain of about 5 to about 20 carbon atoms is equivalent to a peak surface area ratio of no more than about 65% and a peak surface area of no more than about 40,000.

Recording paper used for an electrophotographic system and image recording method

A recording sheet including base paper including pulp fiber and filler, wherein the recording sheet further includes carboxylic acid. An ink jet recording method and an electrophotographic image recording method using the recording sheet.

Recording sheet and image recording method using the same

The present invention provides a recording paper comprising pulp fibers and filler as main components and containing at least a cationic substance and a water-soluble polymer in a surface of the recording paper, wherein conductivity of water is not less than 0.002 S/m as measured at 1 second after immersing a piece of the recording paper with an area of 0.05 min 40 ml of pure water.

Recording paper and image recording method thereof

A recording paper containing pulp fibers and filler as main components and containing at least a heterocyclic carboxylic acid and a water-soluble polymer in the surface of the recording paper, wherein the surface contains at least one kind of cationic substance selected from the group consisting of a cationic organic molecule and a metal salt containing a metal cation of valency two or greater.

Recording paper and image recording method

A recording paper including a substrate which includes cellulose pulp and has a surface treated with a surface sizing solution, wherein the surface sizing solution contains a surface sizing agent and a nonionic surfactant having an HLB in a range of 6 to 13, a content of the nonionic surfactant is in a range of 1 to 100 parts by weight per 100 parts by weight of the surface sizing agent, and the surface sizing agent has a contact angle with water in a range of 40 to 75&#xb0;.

Recording paper and method for recording images using the same

A recording sheet including a cellulose pulp, wherein a water retention value C of the sheet according to the following formula (1) is 50 to 100% and a wet tensile strength residual ratio R of the sheet in CD according to the following formula (2) is 5 to 20%:Water retention value(%)={()/&#x2003;&#x2003;Formula (1)Wet tensile strength residual ratio(%) in=()&#xd7;&#x2003;&#x2003;Formula (2)

The present invention provides an ink set for ink jet recording using at least two kinds of liquids. The first liquid contains at least a colorant, a water soluble solvent and water, and the second liquid contains at least a compound represented by the following general formula (1), a water soluble solvent and water. The present invention also provides an ink jet recording apparatus comprising a recording head from which the ink set for ink jet recording is ejected, and an ink jet recording method by which an image is formed by applying the first and second liquids on a recording medium so as to contact each other 

Ink set for ink jet recording, ink jet recording method and ink jet recording apparatus

In an ink jet recording method, a surface of a recording paper, in which a base paper contains a pulp fiber and a filler, one surface of the base paper being coated with a polyvalent metal salt in a coating amount of from 0.1 to 3 g/m, having a basis weight of from 63 to 100 g/mand an internal bond strength of from 0.05 to 0.2 N&#xb7;m is printed using an ink of at least one color made of at least a pigment, a water-soluble organic solvent, water and a surfactant and having a surface tension of from 25 to 37 mN/m. According to the method, the color reproduction is improved, the inter color bleeding and the feathering of characters are reduced, the double-sided printability is provided by reducing curling and cockling occurring immediately after printing, and curling and cockling occurring after allowing to stand and drying are also reduced.

Ink jet recording method and ink jet recording paper

A recording paper usable in both inkjet recording and electrophotographic recording, and an image recording method using the recording paper. The recording paper includes a base paper that is composed mainly of pulp fibers, contains a filler, and is coated with a cationic resin on one or both sides, wherein surface electric resistivity at 22&deg; C. and 55% relative humidity is 1.0&times;10 to 1.0&times;10 &OHgr; and volume electric resistivity at 22&deg; C. and 55% relative humidity is 1.0&times;10 to 1.0&times;10 &OHgr;&middot;cm.

Recording paper and image recording method using the same

An ink-jet recording method is provided in that upon carrying out printing at a high speed as equivalent to laser printers by using the plain paper, the optical density and the coloring property of the image are high with less occurrence of intercolor breed and feathering, and the image has high water resistance. The method contains a step of printing on recording paper having base paper mainly containing pulp fibers and a filler by using a pigment ink of at least one color at a scanning speed of a printing head of 25 cm/sec or more and a maximum ink injection amount in a range of from 6 to 30 mL/m , the ink having a surface tension in a range of from 20 to 35 mN/m, and an aggregation degree of a pigment contained in the ink in contact with a surface of the recording paper being 5 or more.

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Ebina, Japan

Chizuru Koga