TWI668131B - Positive and negative dot mixed printing method - Google Patents

Abstract

A positive-negative dot-dot hybrid plate-making method is implemented by using a computer and a publishing machine. The method is mainly for obtaining a continuous image of a manuscript by a computer, and converting the image of the original to a halftone dot and generating an official dot plate, and then processing the image. The method uses the official mesh points of the four primary colors to generate a metal color version of the negative dot and adds a record, and then the computer processes the processed metal color plate having the negative dot area and the four printed primary color plates to the publishing machine, and then The publishing machine performs a positive-negative dot printing operation on the printed matter, whereby the positive-negative dot-dot mixed-plate printing method has substantially no overprinting of the color ink and the metallic ink composed of the four primary colors, but the naked-eye view of the printed pattern can produce color. A high-quality image that blends with metallic colors and has a high chroma and metallic texture.

Description

Positive and negative dot mixed printing method

The invention relates to a dot plate printing method, in particular to a positive and negative dot mixing printing method.

The color printing mainly focuses on the ability to express the original, and in order to mass-produce the color print, the current color plate printing method adopts the halftone dot printing method, so that the light and shadow of the simulated original can be changed by using a plurality of dots of different sizes and a near and far arrangement. Continuously adjusted visual effects such as depth and shade.

In the existing halftone dot printing method, the commonly used dot points are divided into two types: amplitude modulation (AM) dot and frequency modulation (FM) dot, wherein the amplitude modulation (AM) dot is the same distance of each dot but the dot size is different; The FM) dot is the same dot size but the center distance of the dot is different. Among them, the darker part is represented by more dots, and the lighter part is represented by fewer dots. The above-mentioned AM dot printing mode or FM The dot printing method is to use the tiny solid dots on the printing to make the human eye produce the illusion of continuously changing the depth of the image.

When printing the printed matter using the above-mentioned existing halftone dot printing method, when the printed matter is intended to produce a metallic printing texture, in conjunction with the drawing of the attached 3, it is necessary to first print with a gold or silver metallic ink 30, generally waiting at least 1 ~2 hours, after the metal ink 30 is dried, the color ink 40 of four primary color inks such as black, cyan, magenta, yellow, etc. is printed again, and overprinted on the dried metallic ink 30, and the color dot pattern after overprinting 50, but because the printing of four primary colors of ink is transparent Although the ink is overprinted on the metallic color, although the metallic color is felt, the printed image of the printed matter 60 is dark, the chroma is not high, and the visual effect is not good.

Due to the existing halftone dot printing method, it is difficult to achieve high chroma printing effect, and due to the limited printing method, the general metallic color is printed with the color image partition block, and a good ink color blending effect cannot be produced.

The object of the present invention is to provide a positive-negative dot-dot hybrid plate-making printing method, which can solve the problem that the printed matter completed by the conventional halftone dot plate-making method can have a metallic color texture, but the overall image has a dark color, a low chroma and an ink color blending effect. Poor and other issues.

In order to achieve the foregoing object, the positive-negative dot-dot hybrid plate-printing method of the present invention is performed by using a computer having an image processing software and a publishing machine, and the positive-negative dot-dot hybrid plate-making method includes: obtaining an original image. The step of continuously converting the image data of the original to be printed in the computer; converting the continuous image of the original into a halftone dot by the computer and generating the step of the official dot making, which is continuous by the image processing means by the computer The image data is converted into a metallic color version and four printing primary color plates each having a specific color official dot, and the computer stores a record for each color version; and a metal color plate step of generating a negative dot by image processing means by a computer The computer first adopts the image processing means of the computer to preset the metallic color version to a black full version, and then selects the color range of the specific color dot in each of the printed primary color color plates to copy and transfer to the metallic color plate and fill in the white color, and After setting the processed black color, the black area that is not filled with white is the negative dot area; Computer storage having a recording process after a negative type halftone dot area metallic plate; Transmitting the processed metal color plate having the negative halftone dot area and the four printed primary color color plates to the publishing machine via a computer; and the negative dot area of the metallic color plate input by the publishing machine according to the four types The primary color version of the dot data, the positive and negative dot printing operations are performed on the printed matter.

The invention discloses the creation of a negative negative dot dot mixed plate printing method by using a computer, which mainly uses a computer to convert a continuous image of a manuscript into a halftone dot and a formal dot plate making, and then uses an image processing means to generate an official dot of four primary colors. The metal color version of the negative dot is added and recorded, and then the processed metal color plate having the negative dot area and the four printed primary color plates are transmitted to the publishing machine by the computer, and then the publisher performs the positive and negative on the printed matter. The dot printing operation, by means of the positive-negative dot-dot mixed-plate printing method, the color ink and the metallic ink composed of the four primary colors are substantially not overprinted, but the naked-eye view printing pattern can produce color and metal color fusion, and high chroma and High quality image with metallic texture.

As described above, the present invention can overcome the limitation of the overprinting effect of the partially transparent ink and the opaque metallic ink in the conventional halftone dot printing method by the positive-negative dot-dot hybrid plate-printing method, so that the transparent ink and the opaque ink are made. Can be blended together to produce high-color metallic texture prints.

1‧‧‧Original continuous image data

2‧‧‧ print

10‧‧‧ Halftone dot image data

11‧‧‧Processed metallic color version of negative dots

S‧‧‧positive and negative dot printing

30‧‧‧Metal ink

40‧‧‧Color ink

50‧‧‧Color dot pattern

60‧‧‧ print

1 is a flow chart of a positive-negative dot-dot hybrid plate-printing method of the present invention.

The positive-negative dot-dot hybrid plate-printing method of the present invention is performed by using a computer having at least an image processing software and a publishing machine, as shown in FIG. 1, and referring to the drawing of the attachment 1 of the present invention, the positive-negative dot-dot hybrid plate-making printing The method for implementing the method includes the steps of: acquiring an image of the original image, which is used to generate the image of the original image of the original to be printed in the computer. In this embodiment, the image to be printed can be generated in the computer by scanning or photographing the original. The original of the pattern is continuously adjusted to the image data, or the image of the original to be printed in the computer is continuously adjusted by the computer drawing means; the step of converting the continuous image of the original into a halftone dot and the step of producing the official dot plate by the computer is performed. The image of the continuous image of the original is converted into a metallic color plate and four printing primary color plates each having a formal color dot of a specific color by a computer processing means, and the computer records the record for each color plate; Schematic, the schema of Annex 1 indicates that the original image data of the original is converted to include a metallic color version. Four halftone dot image data 10 each having a primary color dot of a specific color official dot, in the embodiment, the four printed primary color plates each having a specific color official dot include a black version, a cyan version, In the magenta version and the yellow version, the dot pattern in each of the printed primary color plates may be an amplitude modulation (AM) dot, a frequency modulation (FM) dot or a hybrid thereof, and the computer has a 1-bit tiff for each color plate. The file format stores the record; the metal color plate step of generating the negative dot through the image processing means by the computer, the computer color image is firstly preset to the black full version through the image processing means of the computer, and then each of the printed primary color plates is selected separately. The color range of the specific color dot is copied to the metallic color plate and filled with white, and the black area which is not filled with white in the metallic color plate is set as the negative dot area, and the drawing is shown in the attached figure 2 Using a halftone dot image data 10 comprising a metallic color plate and four printed primary color plates each having a specific color official dot to form a negative metal dot processed metal plate 11; The processed metal color plate having the negative dot area is recorded by the computer, and in the embodiment, the processed metal color plate 11 having the negative dot area is stored in the 1-bit tiff file format by the computer; The processed metal color plate having the negative halftone dot area and the four printed primary color color plates are transmitted to the publishing machine via a computer. In the embodiment, the processing with the negative halftone dot area is performed by a computer. a post-metal color version, and a 1-bit tiff file of the four printed primary color versions, such as the black version, the cyan version, the magenta version, and the yellow version, are transmitted to the publishing machine; and the metallic color version of the input machine is based on the input The negative dot area and the dot data of the four primary color plates perform positive and negative dot printing operations on the printed matter.

In the step of forming a negative color dot by means of a computer image processing means, the color range of the specific color dot in each color version of the black version, the cyan version, the magenta version and the yellow version is respectively copied and transferred to the metal The color version is filled with white, so that the black color area of the metallic color plate is not filled with white to form a negative dot area, which includes: selecting the color range of the official black dot in the black version by the image processing means of the computer to copy and transfer to the metallic color Version, and copy and copy the official black dot color range in the metal color version to fill in the white; through the computer image processing means select the cyan version of the official cyan dot color range copy to transfer to the metallic version, and in the metallic version Transfer and copy the official cyan dot color range and fill it with white; use the computer's image processing method to select the official magenta dot color range in the magenta version to copy and transfer to the metallic version, and copy the official magenta in the metallic version. The color range of the dot is filled in white; the color range of the official yellow dot in the yellow version is selected by the image processing means of the computer. Move to the metallic color version, and transfer and copy the official yellow dot color range in the metallic color version to fill in the white color; and set the black area of the metallic color version that is not filled with white to the negative dot by the image processing means of the computer. region.

The selection of the aforementioned black version, cyan version, magenta version and yellow version has no certain order.

The publishing machine performs the positive and negative dot printing operation steps on the to-be-printed matter according to the negative halftone dot area of the input metallic color plate and the dot material data of the four primary color color plates, and the printing machine is based on the input metal The negative dot area of the color version and the dot data of the four primary color versions are used in the step of performing the positive and negative dot printing operation on the printed matter, which is processed by the publishing machine according to the processed metal color plate having the negative dot area. According to the information, the metallic ink is used to perform the printing operation of the negative dot before the corresponding negative dot area on the printed matter, and the metallic ink may be selected from a silver metallic ink or a gold metallic ink. Secondly, according to the black, cyan, magenta and yellow versions of the network data, the color separation printing or the simultaneous printing means to perform the official dot printing operation on the printed matter. Referring to the drawing of Appendix 2, the positive and negative dot printing is performed on the printed matter according to the dot data of the four primary color plates in the halftone dot image data 10 and the processed metal color plate 11 of the negative dot. And a printed matter 2 having a printed pattern corresponding to the original image is produced.

According to the above description, the positive-negative dot-dot hybrid plate-printing method of the present invention uses a computer to convert a continuous image of a manuscript into a halftone dot and a formal dot plate, and then uses an image processing means to generate a negative dot using an official dot of four primary colors. The metal color plate is added and recorded, and then the processed metal color plate having the negative dot area and the four printed primary color plates are transmitted to the publishing machine by the computer, and then the positive and negative dot printing operations are performed on the printed matter by the publishing machine. The step of making the color ink composed of the four primary colors and the metallic ink substantially have no overprint, but the visually-visible printing pattern can produce a transparent color ink and an opaque metallic ink to fuse with each other to produce a high chroma metallic color print, and High quality image with metallic texture.

annex:

1. A reference diagram of an implementation state of a positive-negative dot-dot hybrid plate-printing method of the present invention.

2. A printed matter reference drawing printed by the positive-negative dot-dot hybrid plate-printing method of the present invention.

3. A reference diagram of an implementation state of a conventional halftone dot plate printing method.

Claims (4)

A positive-negative dot-dot hybrid plate-printing method is performed by using a computer with image processing software and a publishing machine, and the positive-negative dot-dot hybrid plate-printing method includes the steps of: acquiring an original image, which is generated in the computer The original of the printed pattern continuously adjusts the image data; the step of converting the continuous image of the original into a halftone dot and the step of producing the official dot plate by the computer, wherein the image of the continuous image is converted into a metal by the image processing means a color version and four printed primary color plates each having a specific color official dot, and the computer stores a record for each color plate, and the four printed primary color plates each having a specific color official dot are respectively black and cyan Version, magenta version and yellow version, and the computer stores the record in a 1-bit tiff format for each color version; the step of generating a negative color dot metal color through the computer through the computer, which is through the computer The image processing method first presets the metallic color plate to a black full version, and then selects each of the printed primary color plates separately. The specific color dot color range copy is transferred to the metal color plate and filled with white, and the black area which is not filled with white in the metal color plate after processing is set as the negative dot area, wherein the black version and the cyan version are respectively selected. In each of the magenta and yellow versions, the color range of the specific color dot is copied to the metallic color plate and filled with white, so that the black color region of the metallic color plate that is not filled with white forms a negative dot area, including the following : Through the image processing means of the computer, select the black color range of the official black dot in the black version to copy and transfer to the metallic color version, and transfer and copy the official black dot color range in the metallic color version to fill in the white; image processing through the computer The method selects the color range of the official cyan dot in the cyan version and copies it to the metallic color plate, and shifts the color range of the official cyan dot in the metallic color plate to fill in the white color; Through the image processing means of the computer, the color range of the official magenta dot in the magenta version is copied and transferred to the metallic color plate, and the color range of the official magenta dot is transferred in the metallic color plate to fill in the white; through the computer The image processing means selects the color range of the official yellow dot in the yellow version to copy to the metallic color plate, and shifts the color range of the official yellow dot in the metallic color plate to fill in the white color; and the metallic color through the image processing means of the computer The black area that is not filled with white in the version is set as the negative dot area; the step of storing the processed metal color plate having the negative dot area by the computer is processed by the computer after the negative dot area is processed The metal color plate stores the record in a 1-bit tiff file format; the step of transmitting the processed metal color plate having the negative halftone dot area and the four printed primary color color plates to the publishing machine via the computer, The computer will process the processed metal color plate having the negative dot area, and the black plate, cyan version, and magenta having the official dot. The 1-bit tiff file of the four printed primary color versions of the version and the yellow version is transmitted to the publishing machine; and the negative dot area of the input metallic color version and the outlet data of the four primary color versions by the publishing machine, Performing positive and negative dot printing operations on the printed matter, which is performed by the publishing machine according to the processed metal color plate having the negative dot area, and the negative color of the metallic ink before the corresponding negative dot area on the printed matter The printing operation of the dot is followed by the printing of the black, cyan, magenta and yellow versions by color separation or simultaneous printing to perform the official dot printing operation on the printed matter. The method of claim 1, wherein the step of acquiring an image of the original is to continuously image the original of the document to be printed in the computer by scanning or photographing the original. The method of claim 1, wherein in the step of acquiring an original image, the computer drawing means causes the original of the image to be printed in the computer to continuously adjust image data. The positive-negative dot hybrid printing method according to any one of claims 1 to 3, wherein the metallic ink is a silver metallic ink or a gold metallic ink.