Recording sheets and image forming method using the recording sheets
AssigneeFuji Xerox Co., Ltd.
InventorsTakashi Ogino, Kiyoshi Hosoi, Chizuru Koga, Tsukasa Matsuda
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Abstract
A recording sheet obtained by coating a base paper including pulp with a surface sizing agent including a starch as a main component, wherein the recording sheet exhibits a reflection density in a specific range when provided with a povidone-iodine liquid. Also disclosed is a recording sheet prepared by coating the surface of a base paper including a pulp fiber and a filler as main components with a processing liquid including a starch, wherein when 0.06 m2 of the recording sheet is subjected to hot water extraction, a solid amount of an extract is 0.01 to 0.4 g and a carboxyl group content in the solid is 0 to 5 meq/100 g.
Claims16
A recording sheet obtained by coating a base paper including pulp with a surface sizing agent including a starch as a main component, wherein when the recording sheet is left in a condition of 23° C. 50% RH for 5 hours and then the surface of the recording medium is provided with a povidone-iodine liquid having a povidone-iodine concentration of 70 mg/ml and an effective iodine content of 7 mg/ml in an amount of 10 ml/m2 and then the recording sheet is left in a condition of 23° C. 50% RH for 5 hours, the reflection density of the surface provided with the povidone-iodine liquid is 0.60 or lower.
A method for producing a recording sheet comprising:
- mixing a starch and water to form an aqueous starch solution;
- heating the aqueous starch solution, so as to gelatinize the aqueous starch solution;
- then
- aging the aqueous starch solution at a temperature which is lower than a heating temperature of the gelatinization;
- then
- enzymatically modifying the starch by adding an enzyme to the aqueous starch solution;
- then
- heating the aqueous starch solution so as to inactivate the enzyme and to stop the reaction to obtain an enzymatically-modified starch;
- preparing a surface sizing agent including the enzymatically-modified starch as a main component;
- and
- coating a base paper including pulp with the surface sizing agent.
An electrophotographic image recording method comprising:
- uniformly charging the surface of an electrostatic latent image holding member;
- exposing the surface of the electrostatic latent image holding member to form an electrostatic latent image;
- developing the electrostatic latent image with an electrostatic developer to form a toner image;
- transferring the toner image to a surface of a recording sheet;
- and
- fixing the toner image to the surface of the recording sheet,
- wherein the recording sheet is obtained by coating a base paper including pulp with a surface sizing agent including a starch as a main component;
- and when the recording sheet is left in a condition of 23° C. 50% RH for 5 hours and then the surface of the recording medium is provided with a povidone-iodine liquid having a povidone-iodine concentration of 70 mg/ml and an effective iodine content of 7 mg/ml in an amount of 10 ml/m2 and then the recording sheet is left in a condition of 23° C. 50% RH for 5 hours, the reflection density of the surface provided with the povidone-iodine liquid is 0.60 or lower.
An ink-jet image recording method comprising putting ink droplets to a surface of a recording sheet to form an image on the surface,
- wherein the recording sheet is obtained by coating a base paper including pulp with a surface sizing agent including a starch as a main component;
- and when the recording sheet is left in a condition of 23° C. 50% RH for 5 hours and then the surface of the recording medium is provided with a povidone-iodine liquid having a povidone-iodine concentration of 70 mg/ml and an effective iodine content of 7 mg/ml in an amount of 10 ml/m2 and then the recording sheet is left in a condition of 23° C. 50% RH for 5 hours, the reflection density of the surface provided with the povidone-iodine liquid is 0.60 or lower.
A recording sheet prepared by coating the surface of a base paper including a pulp and a filler as main components with a processing liquid including a starch, wherein when 0.06 m2 of the recording sheet is subjected to hot water extraction, a solid amount of an extract is from 0.01 to 0.4 g and a carboxyl group content in the solid is from 0 to 5 meq/100 g.
An electrophotographic image recording method comprising:
- uniformly charging the surface of an electrostatic latent image holding member;
- exposing the surface of the electrostatic latent image holding member to form an electrostatic latent image;
- developing the electrostatic latent image with an electrostatic developer to form a toner image;
- transferring the toner image to a surface of a recording sheet;
- and
- fixing the toner image to the surface of the recording sheet,
- wherein the recording sheet is prepared by coating the surface of a base paper including a pulp and a filler as main components with a processing liquid including a starch;
- and when 0.06 m2 of the recording sheet is subjected to hot water extraction, a solid amount of an extract is from 0.01 to 0.4 g and a carboxyl group content in the solid is from 0 to 5 meq/100 g.
An ink-jet image recording method comprising putting an ink droplet including a colorant and at least one of water and a water soluble solvent, to a surface of a recording sheet to form an image on the surface,
- wherein the recording sheet is prepared by coating the surface of a base paper including a pulp and a filler as main components with a processing liquid including a starch;
- and when 0.06 m2 of the recording sheet is subjected to hot water extraction, a solid amount of an extract is from 0.01 to 0.4 g and a carboxyl group content in the solid is from 0 to 5 meq/100 g.
Dependencies are inferred from the claim text.