Abstract: A transparent recording medium is disclosed which can directly record a fine, precise image. With the recording medium, a compact, fine image occupying a small storage space can be easily enlarged and confirmed by an enlarged projection. It is prepared by applying a coating liquid for recording comprising a developer in which a hydroxyl group with a developing function is blocked by an N-substituted carbamoyl group or an O-substituted oxycarbonyl group, an iron salt of an organic acid or a leuco dye, a near-infrared absorbing agent, and a binder, uniformly dissolved in an organic solvent such as MEK, to a transparent plastic substrate, and drying to obtain a transparent recording layer with a thickness of 3 .mu.m to 8 .mu.m. A visible, precise, fine direct image can then be recorded using a semiconductor laser beam.

Abstract: A hard-coating, heat-absorbing composition which is capable of absorbing near-infrared rays from sunlight and a heat-shielding substance is disclosed. The composition comprises a silicone varnish for hard-coating comprising polysiloxane and, dissolved therein, diphenylthiourea and copper monobutyl-o-phthalate. It can be applied to plastic substrate and heated to cure the silicone varnish, whereupon curing of polysiloxane and production of a heat-absorbing compound are simultaneously effected. The composition ensures to provide various substrates with a heat-shielding characteristic.

Abstract: A shading and light-responsive plate or film is composed or a transparent polymer containing a novel phthalic acid derivative metal salt and further near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.

Abstract: Multicolor printing on a high speed web-fed press with cold-set ink increases production efficiency over that of a press with dryers. For this purpose, newsprint is used because of its good oil absorptiveness, however, the printing quality is not satisfactory. A coating including needle form pigments, the average oil absorptiveness of which is more than 65 cc/100 g, was applied on the base paper, and coated paper for the high speed press was produced.

Abstract: A shading and light-responsive plate or film is composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.

Abstract: A process is provided for producing a coated printing paper by first applying a pigment containing layer, superposing thereon a surface layer of a thermoplastic latex having a second-order transition of at least 80.degree. C. and an average particle size of smaller than 100 nm to produce a coated printing paper having both superior printability and gloss. Another process is provided for producing a coated printing paper by first applying a pigment containing layer, superposing thereon a surface layer of a thermoplastic latex having a second-order transition of at least 80.degree. C. an average particle size of smaller than 100 nm and lubricants, and treating the surface layer with a calender at a temperature, to produce a coated printing paper having both superior printability and high gloss.

Abstract: Near infrared absorbing composition and material comprising a specific thioamide compound and a copper compound and/or a lead compound. The composition and material of this invention provide an uniform absorption over a near IR-region without decreasing other properties.

Abstract: A thermal recording sheet provided with a thermal color developing layer containing colorless or pale colored basic chromogenic dye, a color developer of Formula (I) and at least one of o-xylylene-bis-(phenylether) and 4-(m-methylphenoxymethyl) bisphenyl as a sensitizer. ##STR1## (wherein R is propyl, isopropyl, or butyl.

Abstract: A thermal recording sheet having a thermal color developing layer containing a color developer and a colorless or pale colored basic chromogenic dye, which further contains a stabilizer of Formula (I) and a sensitizer of Formula (II) or Formula (III), thereby obtaining a high sensitivity and improved image stability: ##STR1## wherein A indicates ##STR2## R.sup.1 and R.sup.2 individually indicate hydrogen or methyl; .alpha. is 0 or an integer from 1 to 5; .beta. and .gamma.

Abstract: This invention relates to a recording sheet for an ink jet printer comprising fibrous base material and a back-coating layer formed on the back surface of the base material, which characterized by that the base material contains a cationic polymer size (a), and the back-coating layer comprises a pigment, a binder and two or more of sizes (b1) and (b2), said size (b1) being alkyl ketene dimer, alkenyl succinic anhydride, or wax emulsion, and said size (b2) being a cationic polymer.

Abstract: In an optical recording medium fitted on a substrate a recording layer containing a light absorbent which absorbs light having a central wave length in the near infrared region, performs thermal conversion of light energy and emits heat energy, and a heat-sensitive recording material, a high density image can be recorded with a small amount of laser irradiation by using a specific water soluble infrared absorbing compound as a light absorbent.

Abstract: A strip of paperboard material having a thickness of 170 to 600 .mu.m and a multiplicity of fold lines formed widthwise thereof at a predetermined spacing and U-shaped in cross section is caused to travel as reeved around two prefolding rolls, 5 to 30 mm in diameter, from different directions at a contact angle of 40 to 270 degrees to bring the projecting side of the fold lines into contact with the peripheral suface of one of the rolls and the indented side of the fold lines with the peripheral surface of the other roll. This method imparts increased foldability to the fold lines.

Abstract: A calendering apparatus in which a nip portion is formed by a chilled roll, a backing roll and an endless elastic belt arranged over the backing roll, wherein a paper sheet to be treated passes between the chilled roll and the endless elastic belt. Thus, a paper sheet having a remarkably improved smoothness and gloss can be obtained by the calendering apparatus of the present invention using an endless elastic belt having a relatively long length, without the disadvantage of a heat build-up occurring in a usual calendering treatment. A contacting angle between the belt and the backing roll is 30.degree. or less.

Abstract: A plate or a sheet being capable of absorbing near IR-rays, which is prepared by heating both at least a raw material of a transparent polymer and a mixture of a thiourea compound and a copper compound. This invention provides superior optical materials for shielding sunlight thermic rays, better information recording materials and the like.

Abstract: In an optical recording medium, a light absorbent can be incorporated into a color-developing layer without separately constituting a light absorbing layer by holding the light absorbent in a dispersed or dissolved state in a solvent soluble or heat fusible material. Thus, an optical recording medium which exhibits satisfactory image density with a small amount of the light absorbent can be provided.

Abstract: A process is provided for producing a coated printing paper by first applying a pigment containing layer, superposing thereon a surface layer of a thermoplastic polymeric latex having a second-order transition temperature of at least 80.degree. C., and treating the surface layer with a calendar at a temperature less than the second-order transition temperature, to produce a coated printing paper having both superior printability and high gloss.

Abstract: A heat-sensitive recording sheet of this invention comprises in a heat-sensitive color-developing layer both bis(4-hydroxyphenyl)butylacetate as an organic color-developing agent and a particular fluorane-leuco dye. This sheet provides an intense clear image less discoloration and superior heat-resistant preservability.

Abstract: A shading and light-responsive plate or film is composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.

Abstract: Features of the present invention are connected with an optical recording medium which comprises a substrate, a heat-sensitive color-developing layer containing a basic dye and an organic developer, and a light-absorbing layer containing a near infrared absorbent, the aforesaid layers being superposed upon the substrate, a reflectance at the dominant wave length of a laser beam on the surface of the recording medium being from 15% to 65%; a method for recording by irradiating the optical recording medium with a laser beam condensed by a condenser having a focal length of 0.5 mm or more and a numerical aperture (N.A) of 0.1 to 0.5; and a device for use in the above-mentioned method.

Abstract: This invention concerns an ink jet recording paper characterized by comprising a base layer that contains an internal size, and an ink-receptive layer that is made out of a material having good affinity for inks, wherein the ink-receptive layer is superposed on either one or both sides of the base layer by multi-ply paper-manufacturing process; the structure of the ink jet recording paper is such that it has good ink-absorbency enough to catch up with rapid multi-color printing, and provides high optical image, vivid and uniform image definition, and almost no print through, having desirable paper-like figures and hand feeling.