Abstract: The retardation film has a slow axis with an angle of 10 to 80° with respect to a longitudinal direction thereof and contains cellulose acylate having a degree of acyl substitution of 2.0 to 2.7 and a regulating agent. The retardation film has an in-plane retardation, measured at a wavelength of 550 nm, Ro550, of 115 to 260 nm. The retardation film has a ?Ro is 3 to 30 nm, where ?Ro is Ro550?Ro450, where Ro450 is the in-plane retardation of the film measured at a wavelength of 450 nm. The retardation film without the regulating agent has an in plane retardation, measured at a wavelength of 550 nm, Rc550, and ?Rc(Rc550?Rc450) equal to or greater than 0, where Rc450 is the in-plane retardation measured a wavelength of 450 nm.

Abstract: A retardation film includes a cellulose ether derivative and a compound having a negative intrinsic birefringence, wherein the retardation film includes: a transmittance at a wavelength of 320 to 400 nm of 89% or more; an in-plane retardation Ro550 at a wavelength of 550 nm of 115 to 160 nm; and a ratio (Ro450/Ro550) of an in-plane retardation Ro450 at a wavelength of 450 nm to the Ro550 of 0.72 to 0.94.

Abstract: An optical film includes a cellulose derivative, the film having an in-plane retardation Ro550 within 120 to 160 nm measured at 550 nm wavelength, and a ratio Ro450/Ro550 of in-plane retardations Ro450 and Ro550 within 0.65 to 0.99, respectively, measured at 450 and 550 nm wavelengths, under a 23° C. atmosphere with a relative humidity of 55%, wherein, substituents of glucose skeletons of the cellulose derivative satisfy: part of the substituents have multiple bonds, and the average degree of substitution of the substituents having multiple bonds is within 0.1 to 3.0 per glucose skeleton unit; the maximum absorption wavelength of the substituents having multiple bonds is within 220 to 400 nm; and at least part of the substituents in the glucose skeletons form ether bonds with the glucose skeletons, and the average degree of substitution of the substituents having ether bonds is within 1.0 to 3.0 per glucose skeleton unit.

Abstract: Disclosed is a retardation film which has a slow axis with an angle of 10 to 80° with respect to a longitudinal direction thereof, wherein the retardation film contains cellulose acylate having a degree of acyl substitution of 2.0 to 2.7, and wherein: Ro550 is 115 to 160 nm; ?Ro is 3 to 30 nm; each of ?Rc, ?Ra, and Rc and Ra at a wavelength of 550 nm is equal to or greater than 0; a retardation share ratio of Ra550 to Ro550 is 10 to 80; and a wavelength-dispersion share ratio of ?Ra to ?Ro is 0 to 80.

Abstract: A circularly polarizing plate has a polarizer and two ?/4 plates (T1, T2) bonded respectively onto both sides of the polarizer so as to face each other, the circularly polarizing plate is characterized in that the in-plane retardation values Ro of the ?/4 plates (T1) and the ?/4 plates (T2) satisfy (a) to (c) below in an environment with a temperature of 23° C. and RH of 55%. (a) The in-plane retardation value Ro of the ?/4 plates (T1), when measured within the range of 450 to 650 nm, is 3.0 to 20.0 nm smaller than the in-plane retardation value Ro of the ?/4 plates (T2). (b) The in-plane retardation value Ro of the ?/4 plates (T1) (450) falls within the range of 110 to 140 nm. (c) The in-plane retardation value Ro of the ?/4 plates (T2) (650) falls within the range of 145 to 165 nm.

Abstract: In order to provide an organic electroluminescent display device which does not exhibit redness in reflected external light, and exhibits little fluctuation in the hue of a black image as a result of changes in environmental temperature and differences in the light emitting state, the organic electroluminescent display device according to the present invention comprises, in order from the viewing side, a protective film, a polarizer, a ?/4 phase difference film, and an organic electroluminescent element, and is characterized in that the ?/4 phase difference film satisfies formulas (1) and (2) below. Ro(450)<Ro(550)<Ro(650)??Formula (1) 0.90<photoelastic coefficient ratio(450/650)value<1.

Abstract: A circularly polarizing plate has a polarizer and two ?/4 plates (T1, T2) bonded respectively onto both sides of the polarizer so as to face each other, the circularly polarizing plate is characterized in that the in-plane retardation values Ro of the ?/4 plates (T1) and the ?/4 plates (T2) satisfy (a) to (c) below in an environment with a temperature of 23° C. and RH of 55%. (a) The in-plane retardation value Ro of the ?/4 plates (T1), when measured within the range of 450 to 650 nm, is 3.0 to 20.0 nm smaller than the in-plane retardation value Ro of the ?/4 plates (T2). (b) The in-plane retardation value Ro of the ?/4 plates (T1) (450) falls within the range of 110 to 140 nm. (c) The in-plane retardation value Ro of the ?/4 plates (T2) (650) falls within the range of 145 to 165 nm.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains, wherein at least 50% by number of the silver halide grains is accounted for by cubic grains having a chloride content of not less than 90 mol %, an iodide content of from 0 to 2 mol % and a bromide content of from 0.1 to 10 mol % and containing dislocation lines in the edge region or the corner region of the grains.

Abstract: A silver halide emulsion is disclose, containing silver halide grains, in which at least 50% by number of the silver halide grains is accounted for by (1) cubic grains (2) having a chloride content of not less than 90 mol %, (3) an iodide content of from 0 to 2 mol % and (4) a bromide content of from 0.1 to 10 mol %, and (5) containing dislocation lines in the peripheral region and (6) having rounded corners.

Abstract: A recording medium producing method comprising a step of coating a coating liquid which is a mixture of an inorganic fine particle dispersion and a water-soluble binder on a support, wherein the inorganic fine particle dispersion is prepared by a process comprising the steps of heating the inorganic fine particle dispersion at a temperature of from 45° C. to 60° C. for a time of from 0.5 to 5 hours, standing the inorganic fine particle dispersion at a temperature of from 10° C. to 40° C. for a time of from 0.5 to 5 hours, and mixing the inorganic fine particle dispersion is mixed with the water-soluble binder. This invention provides a method for producing a recording medium for ink-jet recording by supplying a coating liquid which is stable in the viscosity Without increasing during standing period and a recording medium produced by the producing method which has no coating defect and gives high image density.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains, wherein at least 50% by number of the silver halide grains is accounted for by grains having an aspect ratio of less than 1.3, and the silver halide grains have an average chloride content of not less than 90 mol %, an average iodide content of from 0.02 to 2 mol % and an average bromide content of from 0.1 to 9 mol %, wherein the silver halide grains exhibit a coefficient of variation in iodide content among grains of less than 40%.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains, wherein at least 50% by number of the silver halide grains is accounted for by cubic grains having a chloride content of not less than 90 mol %, an iodide content of from 0 to 2 mol % and a bromide content of from 0.1 to 10 mol % and containing dislocation lines in the edge region or the corner region of the grains.

Abstract: A silver halide emulsion is disclose, containing silver halide grains, in which at least 50% by number of the silver halide grains is accounted for by (1) cubic grains (2) having a chloride content of not less than 90 mol %, (3) an iodide content of from 0 to 2 mol % and (4) a bromide content of from 0.1 to 10 mol %, and (5) containing dislocation lines in the peripheral region and (6) having rounded corners.

Abstract: A silver halide emulsion is disclosed, comprising a dispersing medium and silver halide grains, wherein at least 35% by number of the silver halide grains is accounted for by tabular grains (a) having [111] major faces, (b) having an aspect ratio of not less than K and not more than (K+2) wherein K is a numerical value to the first decimal place and selected to be within the range of from 8.0 to 40.0, and (c) having side-faces with a proportion of a [100] side-face per grain of not less than L % and not more than (L+10)% wherein L is a numerical value to the first decimal place and selected to be within the range of from 5.0 to 80.0.

Abstract: Silver halide emulsions are disclosed comprising tabular silver halide grains containing dislocation lines in the peripheral region of the major faces; the tabular grains comprising a high iodide phase which is internal to and along the dislocation lines and an internal region which is surrounded by the high iodide phase and comprised of substantially homogeneous silver halide phase and having an average iodide content of not more than 1 mol %. Silver halide photographic materials by the use of the emulsion are also disclosed.

Abstract: Silver halide emulsions are disclosed comprising tabular silver halide grains containing dislocation lines in the peripheral region of the major faces; the tabular grains comprising a high iodide phase which is internal to and along the dislocation lines and an internal region which is surrounded by the high iodide phase and comprised of substantially homogeneous silver halide phase and having an average iodide content of not more than 1 mol %. Silver halide photographic materials by the use of the emulsion are also disclosed.

Abstract: A silver halide emulsion comprising silver halide grains is disclosed, in which at least 50% of total grain projected area is accounted for by silver halide regular crystal grains exhibiting a proportion of a (100) face per grain of not less than 50% and having an average iodide content of not more than 5 mol %; the silver halide grains having an internal high iodide phase having an average iodide content of not less than 7 mol % and accounting for 0.1 to 15% of the grain volume; the high iodide phase being in the region at a depth of from 7 to 27% from the (100) face, based on the distance between the center of a grain and the (100) face.

Abstract: A silver halide emulsion is disclosed, comprising silver halide grains having a variation coefficient of a grain diameter of 20% or less, at least 50% of total grain projected area being accounted for by tabular silver halide grains having an aspect ratio of 2 or more, said tabular grains each having 10 or more dislocation lines per grain in the peripheral region of the grain and having a variation coefficient of dislocation line length of 20% or less. A color photographic material by use of the emulsion is also disclosed.

Abstract: A magnetic recording medium is disclosed which is improved in the durability thereof. The recording medium has a support and plurality of magnetic layers formed thereon, which layers contain a ferromagnetic powder and binder. A bending stiffness of the medium is 150 to 450 mg and a difference in the bending stiffness between the medium and the medium without its uppermost magnetic layer is not more than 20 mg per 1 .mu.m of thickness of the uppermost layer.

Abstract: There is disclosed a magnetic recording medium having excellent dispersability of ferromagnetic powder and ensuring stable production as well as excellent durability and electromagnetic conversion properties. The recording medium comprises a non-magnetic support and provided thereon at least one magnetic layer containing a ferromagnetic compound, wherein at least one of the magnetic layers contains:a fatty ester of 0.05 to 2 parts by weight per 100 parts by weight of the magnetic powder and,a binder composed of a urethane resin prepared from isocyanate and polyesterpolyol comprising carboxylic acid and diol represented by the following Formula I: ##STR1## wherein R represents a hydrocarbon group having 1 to 6 carbon atoms; and R' represents a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, provided that the total number of carbon atoms included in R and R' is 3 to 10 and that at least one of R and R' is a branched alkyl group having 3 or more carbon atoms.