Abstract: There are disclosed a receiving sheet for sublimation type heat transfer recording comprising a substrate, an intermediate layer formed on the substrate, and an ink-receiving layer formed on the intermediate layer, said intermediate layer comprising a cured resin, and said ink-receiving layer comprising a thermoplastic resin; and a process for producing said receiving sheet. When said receiving sheet is used, the heat shrinkage of the substrate and blocking can be prevented and an image having a high coloring density can be obtained.

Abstract: A heat-transfer recording sheet comprising a support and, coated thereon, a heat-meltable ink layer acquires the ability of reproducing the gradation when said ink layer contains a saturated linear polyester or gallic acid.

Abstract: A fixable thermosensitive recording sheet with excellent shelf life and high developed color density is obtained by using a hydrophobic guanidine derivative as heat-fusible developer in a thermosensitive recording sheet consisting of a substrate, a photo- and thermo-sensitive layer made from a diazonium salt and formed on said substrate, and a developer layer overlying said photo- and thermo-sensitive layer and made from a heat-fusible developer, with a coupler compound contained in at least one of said two layers.

Abstract: This invention relates to a thermosensitive recording system whereby recording is performed by thermal means, more specifically a thermal recording method which is capable of transmitting or recording concavo-convex stereo information by using in combination a thermosensitive stereo recording material principally composed of thermo-expandable microspheres and a thermorecording medium having a thermoplastic ink coating layer.

Abstract: Compounds of the formula(CH.sub.2 .dbd. CH--SO.sub.2 --CH.sub.2 --CH.sub.2 --CO--A).sub.n P,wherein each A, which may be either the same or different, is selected from direct bond, --NH-- and --O--, P represents an n-valent aliphatic moiety which can be interrupted by a nitrogen atom or phenylene radical, and n is 3 or 4, provided that when A is direct bond the nitrogen atom interrupting said aliphatic moiety can be connected through the direct bond, can be effectively used as gelatin hardeners in gelatin-containing photographic layers. Examples of the compounds include 1,1,3,3-tetrakis(vinylsulfonylpropionamido)propane, .alpha.,.alpha.'-tetrakis(vinylsulfonylpropionamido)-p-xylene, 1,2,3-tris[.beta.-(vinylsulfonyl)propionyloxy]propane, N,N',N"-tris[.beta.-(vinylsulfonyl)propionyl]diethylenetriamine, and tetrakis[.beta.-(vinylsulfonyl)propionyloxymethyl]methane.

Abstract: Novel compounds represented by the following general formula are useful as color developing agents for color development which react with couplers to form color images: ##STR1## (wherein R.sup.1 and R.sup.2 which may be the same or different represent alkyl groups of 1 to 4 carbon atoms and R.sup.3 represents hydrogen atom or methyl group).