ADVERTISING SHEET WITH LATENT COLOR PRESENTATION EFFECT

Abstract: An advertising sheet (1) with a latent color presentation effect is disclosed, the effect being capable of selectively exposing the latent colors to the eyes while accomplishing a shiny color presentation effect in accordance with an angle of vision. A plurality of hemispherical embossments (3), having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin, are formed on a printed layer (2) of the sheet (1) at halftone dots formed by overlap of red, blue, yellow and black dots, thus allowing one of the latent primary colors to be selectively exposed to the eyes through the embossments (3) while shining in accordance with an angle of vision. The advertising sheet (1) thus excites customers' interest, thereby improving the advertising effect. According to the invention, a thin coated layer (4), made of a transparent epoxy resin or an ultraviolet resin, may be formed on the printed layer (2), with a plurality of wells (5) being formed on the coated layer (4) at positions around the halftone dots and individually seating an embossment (3) thereon. On the other hand, the printed layer (2) may be formed on the lower surface of a transparent plastic base sheet (6), with the embossments (3) being formed on the upper surface of the sheet (6).

Description: ADVERTISING SHEET WITH LATENT COLOR PRESENTATION EFFECT Technical Field The present invention relates, in general, to advertising sheets, such as handbills or catalogues, and, more particularly, to an advertising sheet with a latent color presentation effect, the effect being capable of selectively exposing latent colors to the eyes in accordance with an angle of vision, with a plurality of hemispherical embossments having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin and being formed on halftone dots formed by overlap of the three primary color dots, or red, blue and yellow dots, and black dots on a printed layer, thus allowing the latent colors of the halftone dots to be selectively exposed to the eyes in accordance with an angle of vision and allowing the advertising sheet to have a shiny color presentation effect at the embossments, and improving the advertising effect. Background Art As well known to those skilled in the art, advertising sheets, such as handbills or catalogues, are printed with specifically designed figures, symbols and/or characters inducing customers to buy goods for sale or exciting customers' interest, or making the goods for sale generally known. Such advertising sheets are conventionally printed in various colors in an effort to accomplish the above- mentioned objects. That is, figures of goods for sale are conventionally printed on the advertising sheets in the same color as that of the goods, while characters to be particularly emphasized are printed in a color prominently different from the background color so as to show the emphasized sign. Such a color print for advertising sheets is accomplished by using the three primary colors along with black. Of course, the three primary colors are red, yellow and blue. During a conventional printing process for advertising sheets, the three primary colors, or red, yellow and blue, and black, may be exclusively used or may be selectively mixed together to produce a variety of desired colors other than the above three primary colors and black. In such a color printing process, a great number of dots of the three primary colors and black are respectively and regularly dotted on a base sheet along matrixes having different angles as shown in Fig. 1. That is, the black dots D are dotted to form an inclined matrix arranged at an inclination angle of 45°, the blue dots B are dotted to form an inclined matrix arranged at an inclination angle of 15°, the red dots A are dotted to form an inclined matrix arranged at an inclination angle of 75°, and the yellow dots C are dotted to form an upright matrix arranged at an angle of 90°. When figures and/or characters are printed on a base sheet in one of the three primary colors and black, the selected color is dotted on the sheet to form a predetermined dot matrix. However, when it is necessary to print figures and/or characters in a color other than the three primary colors and black, the desired color is produced by appropriately and selectively mixing at least two of the three primary colors and black together. For example, when it is necessary to print the figures and/or characters in green, a great number of dots in yellow C and blue B are dotted on a base sheet so as to be partially overlapped as shown in Fig. 2, thus allowing a person to recognize the mixed color as green. On the other hand, when it is necessary to print the figures and/or characters in violet, a great number of dots in red A and blue B are formed on the sheet so as to be overlapped, thus producing the desired violet color. A variety of colors may be produced by selectively mixing the three primary colors and black together during a color printing process. However, such conventionally printed advertising sheets are problematic in that even though the dots in each color are formed on a base sheet so as to be distinguishable from the other color dots, they fail to accomplish the above object since they are not prominently distinguishable from the other color dots. Therefore, the advertising sheets finally fail to induce customers to buy goods for sale or to excite customers' interest, or to make the goods for sale generally known. In an effort to overcome the above-mentioned problems, spherical transparent glass particles or transparent plastic particles are sprayed on the printed layer over images to be emphasized, thus allowing light to be reflected by the particles at the images and accomplishing a desired presentation effect on said images, with the presentation effect prominently distinguishing the images from the other areas on the sheet. However, use of such glass or plastic particles is problematic in that they deteriorate the environmental conditions within a working place in addition to creating environmental pollution. Such glass or plastic particles are expensive materials, thus increasing the manufacturing cost of the advertising sheets. It is very difficult to selectively spray the glass or plastic particles on desired images on the printed layer, and so the printing process of using such particles is undesirably and limitedly used, for example, while printing special advertising sheets. That is, this printing process using such particles is not generally used. Disclosure of the Invention Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an advertising sheet with a latent color presentation effect, the effect being capable of selectively exposing latent colors while accomplishing a shiny color presentation effect in accordance with an angle of vision, with a plurality of hemispherical embossments having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin and being formed on a printed layer at halftone dots formed by overlap of the three primary color dots and black dots, thus allowing the latent colors of the halftone dots to be selectively exposed to the eyes in accordance with an angle of vision and allowing the advertising sheet to have a shiny color presentation effect at the embossments and exciting customers' interest, and improving the advertising effect while reducing the manufacturing cost of the advertising sheets . Brief Description of the Drawings The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: Fig. 1 is a view, showing conventional arrangements of primary color dots, or black dots D, blue dots B, red dots A, and yellow dots C, dotted on sheets at different matrix angles in the prior art; Fig. 2 is a view, showing an overlapped arrangement of the yellow dots C and the blue dots B printed on one sheet so as to produce green; Fig. 3 is a perspective view, showing an advertising sheet with a latent color presentation effect in accordance with the primary embodiment of the present invention; Fig. 4 is a sectional view, showing the sectioned structure of the advertising sheet of Fig. 3; Fig. 5 is a sectional view, showing the sectioned structure of an advertising sheet with a latent color presentation effect in accordance with the second embodiment of the present invention; and Fig. 6 is a sectional view, showing the sectioned structure of an advertising sheet with a latent color presentation effect in accordance with the third embodiment of the present invention. Best Mode for Carrying Out the Invention Fig. 3 is a perspective view of an advertising sheet with a latent color presentation effect in accordance with the primary embodiment of this invention. Fig. 4 shows the sectioned structure of the advertising sheet of Fig. 3. Fig. 5 shows the sectioned structure of an advertising sheet with a latent color presentation effect according to the second embodiment of this invention. Fig. 6 shows the sectioned structure of an advertising sheet with a latent color presentation effect according to the third embodiment of this invention. The advertising sheet of the primary embodiment will be described hereinbelow with reference to Figs. 3 and 4. As shown in the drawings, a printed layer 2, including advertising figures, images, characters, and/or symbols, is formed on a base sheet 6, such as paper or board, thus forming a desired advertising sheet 1 of the primary embodiment. A plurality of hemispherical embossments 3, having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin, are formed on the upper surface of the printed layer 2 at halftone dots formed by overlap of the three primary color dots, or red, blue and yellow dots, and black dots. In such a case, it is possible to partially form the embossments 3 within a limited area on the printed layer 2 or to form the embossments 3 on the total area of the printed layer 2. In addition, the sizes of the three primary color dots and black dots on the printed layer 2 are not equal to each other, and in the same manner, the numbers of the color dots are not equal to each other. That is, the size and number of the color dots are different from each other in accordance with colors close to both the three primary colors and black. Therefore, the size of the embossments 3 on the halftone dots is changed in accordance with the size and/or number of the halftone dots. In the primary embodiment, the size of both the three primary color dots and the black dots on the advertising images of the printed layer 2 is larger than that of the color dots on the background area of the printed layer 2, with the embossments 3 being limitedly formed at the halftone dots within the area on the images. In the advertising sheet 1 according to the second embodiment of this invention, a thin coated layer 4, made of a transparent epoxy resin or an ultraviolet resin, is formed on the upper surface of the printed layer 2 as shown in Fig. 5. A plurality of wells 5 are formed on the coated layer 4 at positions around the halftone dots and individually seat an embossment 3 thereon. The advertising sheet 1 of this embodiment yields the same operational effect expected from the advertising sheet 1 of the primary embodiment. In the advertising sheet 1 of the third embodiment, the base sheet 6 is made of a transparent plastic material, with a printed layer 2 being formed on the lower surface of the base sheet 6 as shown in Fig. 6. A plurality of hemispherical embossments 3, made of a transparent epoxy resin or an ultraviolet resin, are formed on the top surface of the base sheet 6. Of course, the advertising sheet 1 of this embodiment yields the same operational effect expected from the advertising sheet 1 of the primary embodiment. In the second and third embodiments of Figs. 5 and 6, the thin coated layer 4 or the plastic sheet 6 may be made of a transparent ultraviolet resin. In such a case, it is possible to protect the color of the printed layer 2 formed on the sheet 6 from ultraviolet rays and to prevent the color of the layer 2 from being undesirably changed. The operational effect of the advertising sheet of this invention will be described hereinbelow. In order to print a desired advertising sheet 1 of this invention, a color-printed layer 2, including advertising figures, images, characters, and/or symbols, is formed on a base sheet 6, such as paper or board, thus forming the advertising sheet 1 of the primary embodiment. A plurality of hemispherical embossments 3, having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin, are formed on the upper surface of the printed layer 2 through a screen printing process. In order to produce a desired color other than the three primary colors and black during the printing process, the three primary colors, or red A, blue B and yellow C as basic colors, are mixed together along with black, thus producing the desired color meeting the printed images. Such a mixing of the colors produces a variety of colors by appropriately changing both the dot matrix angles and the sizes of the color dots. During the printing process of this invention, the images may be printed in a color, such as green, violet or light pink, other than the three primary colors, or red A, yellow C and blue B, and black D. Such a desired color is produced by selectively and appropriately mixing the three primary colors and black together. In such a color printing process, a great number of dots of the three primary colors and black are respectively and regularly dotted on a base sheet along matrixes having different angles as described for Fig. 1, with the black dot matrix of an inclination angle of 45°, the blue dot matrix of an inclination angle of 15°, the red dot matrix of an inclination angle of 75°, and the yellow dot matrix of an angle of 90°. When it is necessary to produce a desired color close to one of the three primary colors and black, the mixing of the primary colors is performed with large dots of the base primary color and small dots of the other primary color (s) . In a brief description, a desired color other than the three primary colors and black is produced by overlap of dot matrixes of selected primary colors. The hemispherical embossments 3 are formed on the printed layer 2 at the halftone dots formed by overlap of the three primary color dots and black dots. Therefore, the latent colors of the halftone dots are refracted by the embossments 3, thus being exposed to the eyes in accordance with an angle of vision. This allows a person to differently recognize the background color from the latent color exposed to the eyes through the embossments 3. Therefore, the latent color, or one of the primary colors, is exposed to the eyes while shining in accordance with an angle of vision, thus accomplishing a desired color presentation effect. In addition, the sizes of the primary color dots on the printed layer 2 are not equal to each other, and in the same manner, the numbers of the primary color dots are not equal to each other. That is, the size and number of the primary color dots are different from each other in accordance with a basic color of the three primary colors and black used for producing a desired color. The size and number of the basic primary color dots for the desired color are larger than that of the other primary color dots. In addition, the size, number and interval of the embossments 3, formed on the halftone dots, are controlled in accordance with a desired image effect. On the other hand, the size of the three primary color dots and black dots on the advertising images of the printed layer 2 is larger than that of the color dots on the background area of the printed layer 2, with the embossments 3 being limitedly formed at the halftone dots within the area on the images. The advertising sheet 1 of this invention specifically shows a desired color presentation effect at the embossments 3. When such embossments 3 are limitedly formed within an area to be specifically emphasized on the printed layer 2, the embossments 3 accomplish a desired presentation effect at the emphasized area, thus exciting customers' interest and improving the advertising effect. In the second embodiment, a thin coated layer 4, made of a transparent epoxy resin or an ultraviolet resin, is formed on the printed layer 2, with a plurality of wells 5 being formed on the coated layer 4 at positions around the halftone dots and individually seating an embossment 3 thereon. In this embodiment, the embossments 3 are more heightened from the printed layer 2 than that of the primary embodiment, thus having an increased refractive index and more effectively accomplishing a desired color presentation effect. In the third embodiment, the printed layer 2 is formed on the lower surface of the transparent plastic base sheet 6, and so it is possible to more effectively prevent the layer 2 from being undesirably removed from the sheet 6. In the second and third embodiments, the thin coated layer 4 or the plastic sheet 6 may be made of a transparent ultraviolet resin. In such a case, the color of the printed layer 2 may be more effectively protected from ultraviolet rays by the layer 4 or the sheet 6. This finally prevents the color of the layer 2 from being undesirably changed. Industrial Applicability The present invention provides an advertising sheet with a latent color presentation effect. The effect is for selectively exposing latent colors while accomplishing a shiny color presentation effect in accordance with an angle of vision. A plurality of hemispherical embossments, having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin, are formed on a printed layer of the sheet at halftone dots formed by overlap of the three primary color dots and black dots, thus allowing one of the latent primary colors to be selectively exposed to the eyes through the embossments while shining in accordance with an angle of vision. The advertising sheet thus has a desired shiny color presentation effect at the embossments and excites customers' interest, thereby improving the advertising effect. In the present invention, such a latent color presentation effect is easily and effectively accomplished by forming the embossments on the halftone dots through a screen printing process and yields the same effect expected from a conventional advertising sheet using transparent glass or plastic particles sprayed on the printed layer. This finally reduces the manufacturing cost of the advertising sheets, allowing such effective advertising sheets to be produced on a large scale. Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims: Claims : 1. An advertising sheet, comprising a printed layer, including advertising images, formed on a base sheet, such as paper or board, further comprising: a plurality of hemispherical embossments formed on said printed layer at positions around a plurality of halftone dots formed by an overlap of at least two of red, blue, yellow, and black dots on the printed layer, each of said embossments having a convex lens shape and being made of a transparent epoxy resin or an ultraviolet resin, thus giving a latent color exposure effect to the advertising sheet and allowing a latent color of each halftone dot to be selectively exposed to the eyes in accordance with an angle of vision. 2. The advertising sheet according to claim 1, wherein the size of the three primary color dots and of the black dots on the advertising images of the printed layer is larger than that on a background area of the printed layer, with the embossments being limitedly formed within an area on said images. 3. The advertising sheet according to claim 1, wherein a thin coated layer, made of a transparent epoxy resin or an ultraviolet resin, is formed on an upper surface of said printed layer, with a plurality of wells being formed on the coated layer at positions around said halftone dots and respectively seating the embossments thereon. 4. The advertising sheet according to claim 1, wherein said base sheet is made of a transparent plastic material, with said printed layer being formed on a lower surface of said base sheet and said embossments being formed on a top surface of said base sheet.

Inventors: KIM CHUNG HWAN, KIM, CHUNG, HWAN
Applicants: KIM CHUNG HWAN, TECHNOLOGY TREE CO LTD, KIM, CHUNG, HWAN, TECHNOLOGY TREE CO., LTD.
Application year: 1999
Main classification: G09F19
IPC codes: B44F1, G09F19