Abstract: The present invention provides a silver halide photographic photosensitive material which has a printability from color negatives and which can be used as a variable contrast printing paper. This silver halide photographic photosensitive material comprises a support and at least one silver halide emulsion layer provided on the support wherein when .gamma. (gamma) values of characteristic curves obtained by exposure through filters having a transmission maximum wavelength at about 430 nm, about 540 nm and about 700 nm are indicated by .gamma..sub.B, .gamma..sub.G and .gamma..sub.R, respectively, the following inequalities 0.3<.gamma..sub.G /.gamma..sub.B <0.7 and 0.3<.gamma..sub.G /.gamma..sub.R <1.0 are satisfied. Furthermore, an exposing method is also provided.

Abstract: The present invention provides a lithographic printing plate material which comprises a grained and anodized aluminum support and a silver halide emulsion layer between which physical development nuclei are provided wherein said aluminum support have 500 or more pits having a diameter of 0.03-0.30 .mu.m and an average diameter of 0.05-0.20 .mu.m per 100 .mu.m.sup.2.

Abstract: This invention provides a method for making a lithographic printing plate of high resolving power and high printing endurance which comprises imagewise exposing a photoreceptor having a conductive layer and a printing sheet comprising a conductive support having thereon a dielectric non-photosensitive layer which are placed opposite to each other while applying a direct voltage between said conductive layer and said conductive support by a direct current source to form a positive electrostatic latent image on said non-photosensitive layer of the printing sheet and then subjecting the image to development and fixation.

Abstract: Disclosed is a process for producing a titanium dioxide pigment used for a resin-coated paper type photographic support, comprising the following steps:(a) a step of adding at least one alkaline earth metal compound in an amount of 0.01-2.0% by weight in terms of a metal oxide based on the titanium dioxide before calcination step and(b) an acid-washing step of washing the titanium dioxide at acidic state after the calcination step and before a step of surface treatment with a hydrated metal oxide,and wherein particle size of the titanium dioxide pigment is 0.110-0.150 .mu.m shown by number-average diameter obtained by measuring the diameter in a certain direction using an electron microscope.A photographic support which comprises the above titanium dioxide pigment is also disclosed.Occurrence of die lip stain and microgrit are substantially restrained in this photographic support and a photographic material made of it shows improved image sharpness.

Abstract: The present invention is concerned with a thermal delayed tack composition which is non-adhesive at ordinary temperatures but can be activated and tackified when heated and can maintain its tackiness for a long period of time even after separated from a heat source, and thermal delayed tack sheets prepared by coating basic sheets with this thermal delayed tack composition and then drying the same. The thermal delayed tack sheets have the features that even when they are wound into a roll or superimposed upon each other, no blocking or sticking occurs, and that the tackiness thereof can be maintained for a long period of time even upon a plastic material such as for example polyethylene having low polarity.

Abstract: A recording material containing as a color forming system (a) a colorless or light-colored dye precursor, and (b) an isocyanate compound having aromaticity, and if necessary (c) a color developer is excellent in image retention rates in terms of light resistance and plasticizer resistance and has a large degree of freedom of hues.

Abstract: Disclosed is a silver halide photographic lightsensitive material which comprises a support and at least one hydrophilic colloid layer including a silver halide emulsion layer, said hydrophilic colloid layer layer containing at least one dye represented by the following formula (I): ##STR1## (where R.sub.1 represents an alkyl group, R.sub.2 represents an alkyl group or an aryl group, Y represents a group of atoms necessary to form a saturated hydrocarbon ring or a saturated heterocyclic ring together with the carbon atom on the 3 position of pyrrole ring having Z, Z represents a group of atoms necessary to form a benzo condensed ring or a naphtho condensed ring, n represents 1 or 2, m represent 1 or 2 and m is 1 when the dye forms an inner salt, and X.crclbar. represents an anion, with a proviso that a molecule of the dye has at least one acid substituent.

Abstract: The present invention provides a heat sensitive recording material which comprises an aromatic isocyanate compound, an imino compound which reacts with said aromatic isocyanate compound upon application of heat to form a color and a metallic soap which is pulverized together with said imino compound. Preferably the metallic soap has an average particle diameter of 0.5-2.0 .mu.m. This heat sensitive material is excellent in sensitivity and can form an image or excellent stability.

Abstract: The invention provides a process for making a lithographic printing plate utilizing silver image as ink receptive area which is markedly improved especially in printing endurance. The process comprises subjecting a light-sensitive material for lithographic printing plate to imagewise exposure and development and then treating the resulting silver image with an oxidizing agent and a monocyclic compound comprising a nitrogen-containing single ring and having substituents on at least two atoms constituting said ring, said substituents being capable of reacting with silver ion. The oxidizing agent and the monocyclic compound may be contained separately or together in a stop solution, a fixing solution, an etch solution or damping solution or especially prepared solution.

Abstract: Disclosed is a panchromatic silver halide photographic emulsion for use in DTR process which exhibits a high sensitivity, especially to blue light, a high contrast and a high resolving power and a photographic element containing said silver halide emulsion layer. Said emulsion contains a blue-sensitizing dye represented by the general formula [I]: ##STR1## (wherein Z.sub.1, Z.sub.2, R.sub.1, R.sub.2, X.sub.1 and m are as defined before).Said emulsion may contain, as green- and red-sensitizing dyes, those represented by the general formula [II] and [III] to attain more effectively the objects: ##STR2## (wherein Z.sub.3, Z.sub.4, Z.sub.5, Z.sub.6, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, X.sub.2, X.sub.3 and m are as defined before).Said photographic element is an excellent ligtographic printing plate.

Abstract: By providing an intermediate layer composed of colloidal silica and/or alumina between a support and a thermosensitive color forming layer, a thermosensitive recording material having high color sensitivity which is free from undesirable foreign matters adhered to a thermal head can be provided. The colloidal silica and/or colloidal alumina is used in a coverage of 1 to 15 g/m.sup.2.

Abstract: This invention relates to a thermal printing material comprising a substrate and a thermal printing layer formed thereon containing an aromaticity-possessing isocyanate compound, an imino compound having at least one>C.dbd.NH group which reacts with said aromaticity-possessing isocyanate compound on heating to produce color, and one or more aniline derivatives having at least one amino group, said thermal printing layer being intended to improve the image storage properties, in particular, the storage properties of color-undeveloped portion (ground), and it can be utilized in recorders for measurements, facsimiles, printers, terminals of computers, labels, and automatic ticket vending machines.

Abstract: The photosensitive, pressure-sensitive recording sheet of plain paper transfer type of the present invention can be obtained by coating on a substrate, microcapsules mainly containing a photocurable resin and a reactant. This photosensitive, pressure-sensitive sheet can conduct multicolor transfer recording on a plain paper and accordingly has a very high industrial value in light of recent request for transfer recording of color manuscripts.

Abstract: Disclosed is a method for mounting a printing plate having a paper or synthetic resin film as a support on an offset rotary printing press by inserting both ends of the printing plate into a holding slit of printing cylinder and a slit of a gripping rod which comprises previously folding the printing plate at the positions in both end parts of the printing plate which correspond to the positions of the holding slit of the printing cylinder and the slit of the gripping rod, respectively, to form hooked portions to be inserted into the slits, inserting one end portion of the printing plate into the holding slit of the printing cylinder and another hooked portion of the printing plate into the slit of the gripping rod and fixing the printing plate on the printing cylinder by stretching the printing plate by rotating the gripping rod, wherein perforations are previously made along which the printing plate is folded and the printing plate is folded along the perforations when the printing plate is mounted on the r

Abstract: This invention relates to a photosensitive heat-transfer recording sheet and a photosensitive pressure-sensitive recording sheet both using photocurable microcapsules. These sheets enable transfer of multi-color images onto plain papers and accordingly have a very important industrial significance under the present situation where duplicate recording of color images is required.

Abstract: A paper having an absolute dry moisture content (moisture content in absolute dry condition) of 1.8-7% is subjected to a heat calendering treatment at a temperature of 150.degree.-300.degree. C. under a linear pressure of 40 kg/cm or above to provide a paper which has both satisfactory surface smoothness and rigidity (stiffness) and is suited for use as a photographic support.

Abstract: A method for producing microcapsules with an aminoaldehyde polycondensate as a wall material in an aqueous medium containing a water-soluble polymer is disclosed. As the water-soluble polymer, there is used a terpolymer comprising (A) .alpha.-methylstyrene, (B) styrene and (C) maleic anhydride or a quadripolymer comprising (A) .alpha.-methylstyrene, (B) styrene, (C) maleic anhydride and (D) an esterification product of maleic anhydride. This method is especially useful for making pressure-sensitive copy paper.

Abstract: A heat-sensitive color transfer recording medium having a yellow hot-melt ink layer comprising 81 to 92% by weight of a solid wax, 2 to 13% by weight of a resin and a balance of a yellow pigment, can provide clear full color images without causing badness in transfer of a yellow color at initial printing, particularly at low temperature transfer.

Abstract: There is disclosed a desensitizing ink comprising an adduct produced by the addition of 4 to 70 mols of an alkylene oxide to 1 mol of an amine represented by the general formula (I) where 40 mol % or more of said alkylene oxide are butylene oxide: ##STR1##

Abstract: A thermosensitive recording material bearing an undercoat layer comprising fine organic hollow particles having a specific ratio of its wall thickness to its particle diameter provides excellent thermal response and minimizes foreign matters adhered to a thermal head.