Abstract: A dye transfer sheet consisting of a transfer substrate and a coloring material layer comprising a high concentration layer which comprises a dye and is formed on the transfer substrate and a low concentration layer which comprises a water soluble resin or water dispersible resin having a polydimethylsiloxane structure and has a lower dye concentration than the high concentration layer and is formed on the high concentration layer. A dye transfer sheet consisting of a transfer substrate and a coloring material layer comprising a high concentration layer which comprises a dye and a binder polymer cross-linked with a cross-linking agent and is formed on the transfer substrate and a low concentration layer which comprises a water soluble resin or water dispersible resin and has a lower dye concentration than the high concentration layer and is formed on the high concentration layer.

Abstract: The dye transfer type thermal printing sheet of the present invention comprises(a) a substrate, and(b) a lamina comprisinga dye andeither a cured product of a moisture curing type resin or a reaction-cured product of a moisture curing type resin and a reactive silicone oil,on at least one side of the substrate.According to the present invention, a surface release property and surface lubricity can easily be imparted to the color material layer or to the surface layer. Further, since no crosslinking agent is required to cure the resin, curing at low temperature becomes possible. The dye transfer type thermal printing sheet of the present invention can provide a printing sheet useful for high speed recording and/or relative speed recording.

Abstract: When a dyeable layer comprises cured product of at least one moisture-curable type resin, it can have a high image reliability, permit easy control of the printing sensitivity and serve for both low-speed printing and high-speed printing. A receiving sheet having a dyeable layer excellent in surface slipperiness which is useful for high-speed printing and/or relative-speeds printing, can be obtained when the dyeable layer comprises cured product of a moisture-curable type resin, or reaction cured product of a moisture-curable type resin with a reactive silicone oil.

Abstract: A thermal yellow-dye transfer sheet that comprises a base film having thereon a dye layer comprising a yellow-dye dispersed in a binder which comprises at least one dye represented by the general formula (I) and at least one dye represented by the general formula (II): ##STR1## where X is hydrogen or halogen and Y is hydrogen, COOR.sup.3 or CONR.sup.4 R.sup.5 (where R.sup.3, R.sup.4 and R.sup.5 each represents hydrogen, a substituted or unsubstituted alkyl, cycloalkyl, allyl or a substituted or unsubstituted aryl). ##STR2## where Z is hydrogen, chlorine or a lower alkyl, and R.sup.1 and R.sup.2 each represents a substituted or unsubstituted alkyl, cycloalkyl, allyl, or a substituted or unsubstituted aryl.

Abstract: A thermal transfer printing system comprising a dye transfer sheet having a dye carrier layer containing at least one sublimable dye and a dye acceptor sheet having a dye-receiving layer with good affinity for the sublimable dye. The two sheets are arranged during printing operations in such a way that they are facing through a slippage means which is in the form of a layer of particles of lubricating or thermally releasable materials. This system is adapted for a printing process in which a relative speed of the dye transfer sheet to a thermal printing head is smaller than a relative speed of the dye acceptor sheet under which the dye transfer sheet is heated in an imagewise pattern to permit the sublimable dye to deposit on the dye-receiving layer according to the imagewise pattern. The dye transfer sheet and the dye acceptor sheet most suitable for use in the system are also described.

Abstract: The present invention provides a dye transfer type thermal printing sheet which can give a color record image excellent in color reproducibility and weather resistance with middle shade including black and sufficiently saturated density. This printing sheet comprising a substrate on which are arranged, in face-sequence, coloring material layers which are different in hue and contain either of at least one dye represented by the formula (I), at least one dye represented by the formual (II) and at least one dye represented by the formulas (III)-(VI).

Abstract: A thermal magenta-dye transfer sheet that comprises a base film having thereon a dye layer comprising a magenta-dye dispersed in a binder which is mixture of two dyes represented by the general formulas (I) and (II): ##STR1## (where X is a hydrogen atom, a lower alkyl group, a lower alkoxy group, a formylamino group, a lower alkylcarbonylamino group, a lower alkylsulfonylamino group or a lower alkoxy-carbonylamino group; Y is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom; and R.sup.1, R.sup.2 and R.sup.3 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an allyl group or a substituted or unsubstituted aryl group); and ##STR2## Z is a hydrogen atom or a lower alkyl group; and R.sup.4 and R.sup.5 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an allyl group, or a substituted or unsubstituted aryl group, and R.sup.

Abstract: A dye-receiving sheet comprising a substrate and a dye-receiving layer formed on one side of the substrate, the substrate being made of an extruded, biaxially stretched sheet of a mixture of white fine particles and a polyester resin. The extruded, stretched sheet has a specific gravity of from 1.0 to 1.38. A layer of polymer having a thermal deformation temperature or softening point lower than that of the extruded, stretched sheet may be formed on the extruded, stretched sheet. The dye-receiving sheet has high brightness and good flexibility with high printing sensitivity.

Abstract: A thermal transfer printing system comprising a dye transfer sheet having a dye carrier layer containing at least one sublimable dye and a dye acceptor sheet having a dye-receiving layer with good affinity for the sublimable dye. The two sheets are arranged during printing operations in such a way that they are facing through a slippage means which is in the form of a layer or particles of lubricating or thermally releasable materials. This system is adapted for a printing process in which a relative speed of the dye transfer sheet to a thermal printing head is smaller than a relative speed of the dye acceptor sheet under which the dye transfer sheet is heated in an imagewise pattern to permit the sublimable dye to deposit on the dye-receiving layer according to the imagewise pattern. The dye transfer sheet and the dye acceptor sheet most suitable for use in the system are also described.

Abstract: A dye-receiving sheet comprising a substrate and a dye-receiving layer formed on one side of the substrate, the substrate being made of an extruded sheet of a mixture of white fine particles and a polyester resin and a layer of a polymer material or composition whose thermal deformation temperature or softening point is lower than that of the extruded sheet. This sheet has high printing sensitivity.

Abstract: The dye transfer type thermal printing sheet and method for printing of this invention are a printing sheet comprising a transfer sheet in which a smooth heat-resistant layer composed of fine particles, a liquid lubricating material and a polymer is formed on one side of a substrate, and on the other side is formed a coloring material layer containing at least one sublimable dye, non-sublimable particles and a binder, a part of said non-sublimable particles jutting out from the reference surface of the sublimable dye layer; and an image-receiving sheet having, on a substrate for image-receiving sheet, a development layer composed of, at least, inorganic fine particles; a binder having dye-affinity and another binder immiscible with said binder; and a dye transfer type thermal method for printing which comprises placing the aforesaid coloring material layer and development layer of the above-mentioned printing sheet face to face with each other, heating the printing sheet selectively from the smooth heat-resis

Abstract: A dye-receiving sheet for thermal transfer printing which is used in combination with a dye transfer sheet and comprises a substrate and a dye-receiving layer formed on one side of the substrate. The dye-receiving layer is made of a dye-receiving resin matrix dispersing a mixture of a silane copolymer and colloidal silica particles which form strong network structures through silane coupling, and a releasing surface active agent.

Abstract: Dye-receiving sheets for heat transfer recording comprising on a substrate, a dye-receiving layer consisting essentially of a cured product of an acrylate having two acrylic or methacrylic unsaturated bonds. The sheet is used in combination with a dye transfer sheet comprising a sublimable dye, and has a high affinity for the dye and a high heat resistance without bleeding of the dye.

Abstract: Color sheets for thermal transfer printing comprise a substrate having a colorant layer on one side of the substrate and a resin layer formed on one side of the substrate and a resin layer formed on the other side of the substrate, the resin layer being made of a resin composition comprising fine particles and a lubricating material dispersed in a binder resin. The resin layer is made rough on the surface there of due to the presence of the fine particles whereby the color sheets do not stick to thermal heads and the resulting images are free of dropout defects and good in quality.

Abstract: The disclosure is directed to an improved enzyme electrode which includes a first electrode having at least one kind of an enzyme immobilized on it for electrochemically detecting a substance to be produced in association with a reaction based on the enzyme, and a second electrode for electrochemically removing materials which interfere with the detection by the first electrode. The second electrode is disposed at the side of a test solution containing a substrate of the enzyme with respect to the first electrode.

Abstract: A thin film type magnetic recording medium having a coating of ultraviolet ray setting epoxy resin containing a lubricant at least on one major surface. Degradation of resistance to wear may be minimized and stable recording and reproduction characteristics may be ensured even at high temperatures and at high humidity.

Abstract: A layer of a solid state compound including at least one compound selected from the group of fluorine and lead which compound prominently changes its light absorption factor when an electric field is applied thereto, thereby becoming black during the application of the electric field. Therefore, the solid state compound layer provided with at least an electrode on one face thereof can be used as a display device or a recorder.