Abstract: The color-developing agent for pressure-sensitive recording sheet comprises the polyvalent-metal salt of carboxylated terpenephenol resin. The color-developing sheet containing the above color-developing agent provides excellent yellowing-resistance, superior color-developing ability and improved fastness of the colored image.

Abstract: The process for producing microcapsules comprises forming capsules having a wall film composed of an amine-aldehyde polycondensate in a system in which a hydrophobic core substance is dispersed or emulsified in an acid aqueous solution containing an anionic colloidal substance, said anionic colloidal substance being an anionic water-soluble copolymer composed of acrylic acid, styrenesulfonic acid, and alkyl acrylate or alkyl methacrylate. The present invention decreases the large particles present in the capsule slurry, and provides microcapsule which are excellent in emulsification power, emulsification stability, particle size distribution, impermeability of capsule-wall film and workability.

Abstract: A heat-sensitive recording material comprises a support and a color-developing layer having both a particular saturated higher fatty acid iron salt and a particular polyvalent phenolic derivative. The heat-sensitive recording material provides a superior thermal response and a high stabilty of the developed image.

Abstract: A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said organic color developer consisting of at least partly of a halogen-substituted benzoic acid zinc salt represented by the following general formula ##STR1## wherein X.sub.1 represents a halogen atom, X.sub.2 represents a hydrogen or halogen atom, and R.sub.1, R.sub.2 and R.sub.3, independently from each other, represent a hydrogen atom or an alkyl, alkoxy, cycloalkyl, nitro, cyano or hydroxyl group.

Abstract: A paperboard container made of a paperboard blank with polyethylene coatings on its front and back surfaces, the overlying ends of the paperboard blank being heat sealed through the polyethylene coatings. The container includes a sealing tape which consists of a polyethylene base and a non-heat sealing layer and the polyethylene base is heat sealed to the polyethylene coatings inside the container except for a portion of the heat sealing layer so that the non-heating sealing layer covers the sectional end of the paperboard blank.

Abstract: A heat sensitive recording sheet including p-benzyloxybenzoic acid benzylester and filler in its color-forming layer which contains a basic colorless or pale-colored chromogenic dyestuff and an organic color-developing agent whereby a heat sensitive recording sheet having a highly stable developed image against oily substances such as hair oil, sweat, etc. is provided without deteriorating the fundamental qualities of the heat sensitive recording sheet.

Abstract: This invention discloses a process for producing 2,6-bis (4-hydroxy-3,5-dimethoxyphenyl)-3,7-dioxabicyclo [3.3.0] octane, i.e. syringaresinol and stereo-isomers thereof, from plants which contain lignin with syringyl unit. The process comprises heating plant under pressure in hydrous condition, and then quickly discharging them therefrom into an environment at atmospheric pressure so as to explode into pieces and subjecting the fine pieces to extraction with organic solvent such as methanol and acetone or an alkaline solution such as sodium hydroxide and purification. Syringaresinols are useful like ginseng as a tonic.

Abstract: Top or bottom structure for a paper container with a flat type top or bottom having opposed outside bottom plates formed of board paper having thermal adhesive plastic layers on both front and back surfaces and opposed inside bottom plates having folding lines of isosceles triangular shape. A first end piece (10) extending from a first outside bottom plate (6), disposed at the outermost side during assembling and shaping, extends further than other end pieces (11, 12, 13). A second end piece (12) of a second outside bottom plate (8) is formed in a tongue shape by first and second cutouts at right and left sides, which first and second cutouts are equal in depth to adjacent additional cutouts extending 2/5 of the length along the inside bottom plates. Third and fourth cutouts (26, 27) are formed on the second outside bottom plate at the right and left sides of the second end piece, and an assembling and folding line (30) is formed between the points of greatest cutting depth of said third and fourth cutouts.

Abstract: An ink jet recording sheet for overhead projection or blue copy comprising on a transparent or translucent support an ink-absorbing layer which is made by coating an organic solvent which contains a denatured polyethylene oxide being soluble in the organic solvent and having a water absorbing ability onto the transparent or translucent support. The ink jet recording sheet which results provides excellent ink drying ability and high optical density, and is excellent for overhead projection or blue copy.

Abstract: Heat-sensitive recording sheet comprising in a heat-sensitive color forming layer a colorless basic dyestuff and 4-isopropoxy-4'-hydroxydiphenyl sulfone as organic developer, wherein said color forming layer contains as sensitizer one of the compounds represented by the following formula (II) or (III): ##STR1## where, in the general formula (II) and (III), A represents a hydrogen atom, halogen atom, nitro group, lower alkyl group, lower alkoxy group or hydroxy group, l represents an integer from 1 to 5 and m represents an integer from 0 to 3. The sheet provides high density images and excellent stability of images.

Abstract: A heat-sensitive recording sheet comprising both calcium monobenzyl phthalate as stabilizer and 4-isopropoxy-4'-hydroxy diphenylsulfone and/or 4-methyl-4'-hydroxy diphenylsulfone as organic developer in heat-sensitive layer which comprises a basic colorless dyestuff and an organic developer. This heat-sensitive recording sheet provides the improved stability of developed color image against sticking of hair tonics and oils, etc.

Abstract: A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said layer containing a polyphenyl ester compound of the general formula ##STR1## wherein R.sup.1 and R.sup.2, independently from each other, represent an alkyl group, a cycloalkyl group, or an aryl, aralkyl or aryloxyalkyl group which may have at least one substituent selected from the class consisting of halogen atoms, nitro groups, hydroxyl groups, lower alkyl groups and lower alkoxy groups.

Abstract: Heat-sensitive recording sheet comprising a base sheet a color-forming layer including a colorless basic dyestuff and an organic color-developing agent, wherein said color-forming layer comprises a metal salt derivative of nitrobenzoic acid (having a particular formula). The sheet provides superior stability against contamination with oily substances while keeping excellent fundamental qualities thereof.

Abstract: Heat-sensitive recording sheet comprising a base sheet and a color-forming layer including a colorless basic dyestuff and an organic color-developing agent, wherein said color-forming layer comprises a metal derivative of phthalic acid monoester (having a particular formula). The sheet provides superior stability against contamination with oily substances while keeping excellent fundamental qualities thereof.

Abstract: Heat-sensitive recording sheet comprising a heat-sensitive color developing layer having particular chemicals on the support sheet and an overcoat layer laminated thereon and a backcoat layer on the back of the support sheet, wherein the sheet provides excellent coloring characteristics and high stability in storage.

Abstract: A blank structure for liquid having horizontal and vertical fold lines, bordered by specifically designed indented fold lines, the depth of grooves of the fold lines are gradually decreased toward the crossings of the respective fold lines. Thus, cracks or pinholes at the corners of the folded blank due to the folding stress in case of forming a container can be completely prevented.

Abstract: A thermosensitive recording sheet having a thermosensitive color developing layer containing a basic leuco dye and an organic color developer, said organic color developer consisting at least partly of a hydroxybenzoyloxybenzoic acid ester represented by the general formula (I) ##STR1## wherein R represents an alkyl group, a cycloalkyl group, or an aryl, aralkyl or aryloxyalkyl group which may have at least one substituent selected from the class consisting of halogen atoms, nitro groups, hydroxyl groups, lower alkyl groups and lower alkoxy groups.

Abstract: A recording sheet for thermal dye-transfer type recording method, having a coating layer which is placed on a substrate, is contacted with a coloring material layer containing sublimable dye and on which the dye is transferred by heating. The coating layer includes as a pigment precipitated calcium carbonate of at least 25,000 cm.sup.2 /g specific-surface-area and as a binder saturated polyester or a mixture of saturated polyester with polyvinyl pyrrolidone. The sheet provides a clear record with superior color density.

Abstract: A heat-sensitive recording sheet having a color-forming layer comprises a colorless basic dyestuff and an organic color-developing agent, in which the color-forming layer uses a bis-(4-hydroxyphenyl)sulfide compound as the color-developing agent which comprises a compound of particular structure. The sheet provides a superior water-proofness.

Abstract: Electroconductive base sheet for electrostatic according which comprises an electroconductive layer containing both a metal oxide semiconductor of this invention and at least one substance selected from the group consisting of a reducing saccharide, a derivative thereof, ascorbic acid, an optical isomer of ascorbic acid and a reducing ascorbic acid derivative of this invention. The electroconductive base sheet provides a superior electroconductivity.