Abstract: On a surface of a decorative paper, vessel perforation of natural wood is reproduced by an offset groove (100) consisting of three steps of embossing grooves (110, 120, 130) of the nesting structure. Respective grooves are such that they are deeper according as positions thereof shift to the internal, and are disposed in a manner to be eccentric in a length direction. Within the groove, a convex bank portion (140) in which the bottom surface is linearly protruded is formed. An embossing plate for processing such an offset groove is prepared on the basis of a vessel cross section pattern inputted by using natural wood. The inputted plane vessel cross section pattern is replaced by an approximate elliptical figure. A three-dimensional virtual vessel perforation model is determined by calculation using the elliptical figure. Equi-depth lines for set predetermined depths are extracted from the three-dimensional model and contour figures of embossing grooves (110, 120, 130) are obtained.

Abstract: A method of designing a cubic receptacle which determines the form of the receptacle in consideration of an internal capacity of the receptacle or an amount of material required for manufacturing the receptacle to prepare a two-dimensional pictorial image of the receptacle of which form is thus determined with a label being attached thereon to appraise the pictorial image thus obtained. To carry out the above design, a computer and various input/output units are used.In addition, a designing method particularly suitable for determining the form of a receptacle of body of revolution. Such a determination of the form is made using a coordinate input unit.Moreover, a technique is provided for representing a three-dimensional body in a two-dimensional manner, especially to a techique for representing a cubic receptacle on which a label is attached in a two-dimensional manner. In addition, a special algorithm is used for representing an impression of material quality of the receptacle.