Abstract: It is an object to provide a three-dimensional game apparatus and information storage medium which can display an object located at a position nearer a viewpoint to improve the reality in an image. It is judged whether or not a first object (or polygon or curved surface) is located at a position near the viewpoint. When the first object is located at the position near the viewpoint, a second object which is N times as large as the first object is located at a position spaced away from the viewpoint by L2=N.times.L1. The above judgment is performed based on whether or not the length L1 or depth coordinate Z1 of a vector is equal to or less than a given value. The drawing priority is determined by using 1/N of the depth coordinate of the second object or a second polygon or by using the depth coordinate of the first object or a first polygon. The shape data of the second object N times as large as the first object has been previously provided.

Abstract: It has been found that phthalic acid monoester represented by the general formula: ##STR1## in which R is a saturated alkyl group of 4 to 20 carbon atoms where X is an alkyl group, a halogen or an alkoxy group, is applicable as color-developing agent to prepare heat-sensitive recording sheet with excellent results. It is observed that one of the two carboxylic acid groups of which phthalic acid is composed is esterified with the group mentioned in the claim to form water-insoluble, insublimable compound having melting point of 90.degree. to 130.degree. C. wherein the group introduced controls the acidity of the adjacent carboxylic acid group into a condition suitable for stable and concentrated color-development of colorless dye.

Abstract: A color-developing sheet for pressure-sensitive recording sheets having a color-developing layer on the base sheet wherein the color-developing layer includes 3 to 20 parts by weight of zinc carbonate, 1 to 30 parts by weight of thiourea compound and 0.1 to 5 parts by weight of bisphenol per 100 parts by weight of activated clay.

Abstract: Pressure-sensitive recording sheets which comprise at least a transfer sheet having on its one side a coating including microcapsules containing as color-former black color-forming fluoran dye and a color-developing sheet having on its one side a color-developer layer containing at least activated clay, zinc carbonate and thiourea compound. The pressure-sensitive recording sheets of this invention provide pure black color image having high-color density, excellent light fastness and less color change with the lapse of time.

Abstract: A color developing sheet for pressure-sensitive recording sheet containing in its color-developing layer an organic coreactant (color-developing agent), calcium carbonate and acrylamide-modified polyvinylalcohol with this construction the color developing sheet provides very much improved mark formation and improved printability such as high surface strength, rapid ink setting, etc..

Abstract: A heat-sensitive recording sheet containing in its color-forming layer a colorless or pale colored chromogenic fluoran-type dyestuff and p-hydroxybenzoic acid ester having the following general formula ##STR1## wherein R represents ##STR2## This heat-sensitive recording sheet incorporates high image density and very preferable recording aptitude with less abrasiveness and less residues accumulated even for long time recording.Furthermore, a phenol substance having a melting point of more than 90.degree. C. and a solubility of less than 0.1 g per 100 g water, which is used together with said p-hydroxybenzoic acid ester, is useful for lowering the yellowing of the heat-sensitive sheet.

Abstract: A heat-sensitive recording paper containing in its color-developing layer aluminum hydroxide as fillers and a colorless or pale-colored chromogenic dyestuff and a phenolic substance as chromogenic elements. This heat-sensitive recording paper incorporates high image density and very preferable recording aptitude with less abrasiveness and less residues accumulated even for long time recording.

Abstract: A color-developing sheet for pressure-sensitive recording sheets, said sheet comprising as a color-developing agent at least one 2,2'-bisphenolsulfone nickel salt selected from compounds of the following formula ##STR1## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group, or a mixture of at least one 2,2'-bisphenolsulfone nickel salt of the above formulae (II) and (III) and at least one 2,2'-bisphenolsulfone zinc salt of the following formula ##STR2## wherein R.sub.1 and R.sub.2 are the same as R.sub.3 through R.sub.8 defined above.

Abstract: A color-developing sheet for pressure-sensitive recording sheets, said sheet comprising as a color-developing agent at least one 2,2'-bisphenolsulfone zinc salt selected from compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group.

Abstract: A heat-sensitive recording paper containing in its color-developing layer calcined clay or calcined aluminum oxide provides an excellent recording aptitude for a facsimile equipment or thermal printer without producing residues deposition, sticking, bleeding or smearing in recording or printing.