TW202005817A - Positive and negative halftone dot mixed plate-making printing method producing an integration of colors and metallic colors and high-quality images with high chroma and metallic color properties - Google Patents

Abstract

A positive and negative halftone dot mixed plate-making printing method which is executed by a computer and a publishing machine. The method mainly includes the following steps of: after obtaining an original image, converting by a computer the original continuous-tone image to halftone dots and generating a formal halftone dot plate, then through an image processing means using the formal halftone dots of four primary colors to generate and record a metallic color plate of negative dots, and then transferring by the computer the processed metallic color plate with negative dot areas, as well as color plates of the four printing primary colors to a publishing machine, and then performing by the publishing machine positive and negative halftone dot printing operations on the objects to be printed. With this mixed positive and negative halftone dot printing method, the color ink composed of the four primary colors and the metallic ink are not substantively overprinted, but the printed pattern can produce an integration of colors and metallic colors, and high-quality images with high chroma and metallic color properties when being viewed with naked eyes.

Description

Positive and negative type dot mixed plate-making printing method

The invention relates to a halftone dot platemaking and printing method, in particular to a positive and negative halftone dot platemaking and printing method.

Color printing mainly focuses on being able to express the original manuscript, and in order to mass-produce color prints, the current color plate printing method adopts halftone dot printing method, so as to simulate the light and shadow changes of the original manuscript by using many dots of different sizes and near and far arrangement , The visual effects of continuous adjustment of levels and shades.

In the existing halftone dot printing method, the commonly used dots are generally divided into two types: amplitude modulation (AM) dots and frequency modulation (FM) dots. Among them, the amplitude modulation (AM) dots are the same center distance of each dot but the dot size is different; FM ( FM) dots are the same dot size but different dot center distance. Among them, the darker parts are presented by more dots, and the lighter parts are presented by fewer dots. The aforementioned AM dot printing method or frequency modulation The dot printing method is to use the printing of many tiny solid dots to make people's eyes have the illusion of continuously adjusting the depth of the image.

When printing the printed matter using the above-mentioned existing halftone dot printing method, when the printed matter wants to produce a metallic printing texture, as shown in FIG. 4, it is necessary to first print with gold-based or silver-based metallic ink 30 as the base, generally waiting at least 1-2 After the metal ink 30 is dried, the color ink 40 of the four primary colors of black, cyan, magenta, and yellow is printed again, and overprinted on the dried metal ink 30, the color dot pattern 50 after overprinting, However, because the four-primary color inks are transparent inks, although the metal color texture is overprinted on the metal color, the printed image of the whole printed matter 60 is dark, the chroma is not high, and the visual effect is also not good.

Because the existing halftone dot printing method is difficult to achieve high chroma printing image effects, and due to the limited printing method, the general metallic color is printed in blocks with color pictures, which cannot produce a good ink color fusion effect.

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

In order to achieve the above-mentioned purpose, the positive and negative type dot hybrid plate-making printing method proposed by the present invention is executed by using a computer with image processing software and a publishing machine. The positive-negative type dot hybrid plate-making printing method includes: obtaining an original image The steps of generating the continuous image data of the original to be printed on the computer by the computer; converting the continuous image of the original image into halftone dots through the computer and producing the formal dot plate making, which is the continuous processing of the original by the computer through image processing Convert the image data into a metallic color plate and four printed primary color plates with specific dots of specific colors, and store records for each color plate by the computer; Step of generating a negative color dot by the computer through image processing , Which is to preset the metal color version to black full version through the image processing method of the computer, and then select the specific color dot color range in each printed primary color color version, copy and transfer to the metal color version and fill it with white, and Set the black area that is not filled with white in the processed metal color version as the negative dot area; store and record the processed metal color version with the negative dot area through the computer; the previously processed metal color with the negative dot area through the computer Version, and the four printing primary color plates are sent to the publisher; and the publisher performs positive and negative expressions on the product to be printed based on the input negative dot area of the metallic color plate and the dot data of the four primary color plates Dot printing action.

The invention is based on the creation of the positive and negative dot mixed plate-making printing method, which mainly uses a computer to convert the continuous image of the original manuscript into halftone dots and generates a formal dot plate making, and then uses image processing means to generate the formal dots of the four primary colors. The metal color version of the negative dots is added and recorded, and then the processed metal color version with the negative dots area and the four printing primary color versions are transferred to the publishing machine by the computer, and then the publishing machine executes the positive and negative forms on the products to be printed Dot printing operation, with the positive and negative dot mixed plate-making printing method, so that the color ink composed of four primary colors and the metallic ink do not substantially overlap, but the naked eye viewing the printed pattern can produce the fusion of color and metallic color, and high chroma and High-quality image with metallic color texture.

According to the above, the present invention makes it possible to break through the limitation of the overprinting effect of the partially transparent ink and the opaque metallic ink in the existing halftone dot printing method through the aforementioned positive and negative dot dot plate-making printing method, making the transparent ink and the opaque ink To be able to blend with each other to produce high-chromatic metallic color texture prints.

The positive-negative dot dot hybrid plate-making printing method of the present invention is executed using a computer and a publishing machine equipped with at least image processing software. As shown in FIG. 1, the implementation steps of the positive-negative dot dot hybrid plate-making printing method include: obtaining an original image The step is to generate the continuous image data of the original of the pattern to be printed in the computer. In this embodiment, the continuous image image data of the original of the pattern to be printed can be generated in the computer by scanning or photographing the original, or Use computer drawing to make the computer continuously adjust the image data of the original to be printed in the computer; convert the original image to halftone dots through the computer and generate the formal dot plate making steps, which is to continuously adjust the manuscript through the computer through image processing The image data 1 is converted into a metallic color plate and four printed primary color plates with formal dots of specific colors, and the computer stores a record for each color plate; as shown in Figure 2, picture 1 represents the continuous image data conversion of the original It is a halftone dot image data 10 including a metallic color plate and four printed primary color plates with official dots of a specific color. In this embodiment, the four printed primary color plate plates with formal dots of a specific color Including black version, cyan version, magenta version and yellow version, etc., the dot type in each of the printed primary color version can be amplitude modulation (AM) dots, frequency modulation (FM) dots or a mixed type, and each computer The one-color version saves the record in a 1-bit tiff file format; the step of generating a metal color version of the negative dots by computer image processing means, which is to preset the metal color version to black full version through the computer image processing method, and then separately Select the color range of specific color dots in each printing primary color plate, copy and transfer to the metal color plate and fill it with white, and set the black area in the metal color plate that is not filled with white as the negative dot area after processing, as shown in Figure 3 As shown, it represents the use of a halftone halftone dot image data 10 including a metallic color plate and four printed primary color plates each having a specific color official dot to form a negative metallic dot processed metallic color plate 11; The processed metallic color plate of the negative dot area, in this embodiment, it is a computer to store the processed metallic color plate 11 with the negative dot area in a 1-bit tiff file format; The processed metallic color plate with a negative dot area and the four printing primary color plates are sent to a publishing machine. In this embodiment, the processed metallic color plate with a negative dot area is used by a computer. And the 1-bit tiff file of the four printing primary color versions of the black version, cyan version, magenta version and yellow version, etc., is sent to the publisher; and the negative dot area of the metallic color version and The dot data of the four primary color plates are printed with positive and negative dots on the product to be printed.

In the step of generating a negative halftone dot by a computer through image processing means, the color range of specific dots in each color version of the black version, the cyan version, the magenta version and the yellow version are selected and copied to the metal The color version is filled with white, so that the black region that is not filled with white in the metal color version forms a negative dot area. It includes: selecting the official black dot color range in the black version through computer image processing means, copying and transferring to the metallic color Version, and transfer and copy the official black dot color range in the metal color version to fill with white; select the official cyan dot color range in the cyan version through the computer image processing method, copy and transfer to the metal color version, and in the metal color version Transfer and copy the official cyan dot color range to white; select the official magenta dot color range in the magenta version through computer image processing to copy and transfer to the metal version, and transfer and copy the official magenta in the metal version Fill the white dot color range with white; select the official yellow dot color range in the yellow version to copy to the metal color version through the image processing means of the computer, and transfer and copy the official yellow dot color range in the metal color version to fill in white; and The black area that is not filled with white in the metallic color plate is set as a negative dot area through image processing means of a computer.

There is no certain order for the selection of the black version, cyan version, magenta version and yellow version.

According to the negative dot area of the metallic color plate and the dot data of the four primary color plates that are input by the publisher, the positive and negative dot print action steps are performed on the product to be printed. The negative dot area of the color plate and the dot data of the four primary color plates, in the step of performing positive and negative dot printing on the printed product, it is a metal color plate processed by the publisher according to the negative dot area According to the data, the metallic color ink is used to perform the negative dot printing operation before the part corresponding to the negative dot area on the product to be printed. The metallic color ink may be silver metallic ink or golden metallic ink. Secondly, according to the dot data of the black version, cyan version, magenta version and yellow version, the formal dot printing operation is performed on the to-be-printed product by means of color separation printing or simultaneous printing. As shown in FIG. 3, it performs positive and negative dot printing S on the to-be-printed product based on the dot data of the four primary color plates in the halftone dot image data 10 and the processed metal color plate 11 data of the negative dot. A printed product 2 having a printed pattern corresponding to the original image is produced.

As can be seen from the above description, the positive and negative dot mixed plate-making printing method of the present invention uses a computer to convert the continuous image of the original manuscript into halftone dots and generates a formal dot platemaking, and then uses image processing means to generate negative dots using the formal dots of the four primary colors The metal color plate is added and recorded, and then the processed metal color plate with negative dot area and four printing primary color plates are transferred to the publishing machine by the computer, and then the printing machine performs positive and negative dot printing on the to-be-printed product, etc. Steps, so that the color ink composed of the four primary colors and the metal color ink are not substantially overprinted, but visually printing the pattern can produce a transparent color ink and an opaque metal color ink to merge with each other to produce a high chroma metal color texture print, and High-quality image with metallic color texture.

1‧‧‧ Manuscript continuous adjustment image data 2‧‧‧ Printed matter 10‧‧‧ Halftone dot image data 11‧‧‧Negative dot processing Metal color version S‧‧‧ Positive and negative dot printing 30‧‧‧Metal ink 40‧‧‧Color ink 50‧‧‧Color dot pattern 60‧‧‧Printed matter

FIG. 1 is a flow chart of the positive and negative type dot hybrid plate-making printing method of the present invention. FIG. 2 is a reference diagram of an implementation state of a positive and negative dot hybrid plate-making printing method of the present invention. FIG. 3 is a reference diagram of a printed product printed and formed using the positive and negative type dot hybrid plate-making printing method of the present invention. FIG. 4 is a reference diagram of an implementation state of a conventional halftone dot plate printing method.

Claims (7)

A positive-negative dot-dot hybrid plate-making printing method is performed using a computer with image processing software and a publishing machine. The positive-negative dot-dot hybrid plate-making printing method includes: a step of obtaining an original image, which is generated in a computer to be printed The continuous image adjustment of the original image of the pattern; the steps of converting the continuous image adjustment of the original image into halftone dots and producing a formal dot platemaking through a computer, which is to convert the continuous image adjustment of the original image data into a metallic color plate by image processing means through the computer and Four printed primary color plates with formal dots of specific colors, and records are stored for each color plate by the computer; the metal color plate step of generating negative dots by computer image processing means, which is achieved by the computer image processing means The metal color version is preset to be a black full version, and then select the specific color dot color range in each printing primary color color version, copy and transfer to the metal color version and fill it with white, and set the non-filled white in the metal color version after processing The black area is the negative dot area; the processed metal color plate with the negative dot area is stored and recorded through the computer; the processed metal color plate with the negative dot area is described above through the computer, and the four printing primary color plates It is sent to the publishing machine; and the publishing machine executes positive and negative dot printing on the product to be printed according to the input negative dot area of the metallic color plate and the dot data of the four primary color plates. The positive-negative dot hybrid plate-making printing method according to claim 1, wherein in the step of obtaining an image of the original document, the image of the original document to be printed is continuously adjusted in the computer by scanning the original document or taking photographs. The positive-negative type dot mixed plate-making printing method according to claim 1, wherein in the step of obtaining the original image, the computer drawing means causes the computer to generate the image of the original to be continuously printed in the computer. The positive-negative type dot mixed plate-making printing method according to any one of claims 1 to 3, wherein in the steps of converting a continuous tone image of an original through a computer into halftone dots and generating a formal dot plate-making, the four types The printed primary color plates with official dots of specific colors are black plate, cyan plate, magenta plate, and yellow plate respectively, and the computer stores records for each color plate in a 1-bit tiff file format; In the step of processing the metallic color plate with the negative dot area, the computer records the processed metal color plate with the negative dot area in a 1-bit tiff file format; the computer has the negative type In the step of transferring the processed metallic color plate of the dot area and the four printing primary color plates to the publishing machine, the processed metallic color plate having the negative dot area and the formal dot The 1-bit tiff files of the four printing primary color versions of the black version, cyan version, magenta version and yellow version are sent to the publishing machine. The positive-negative dot hybrid plate-making printing method according to claim 4, wherein in the step of generating a negative-tone dot by a computer through image processing means, the black plate, the cyan plate, the magenta plate and the black plate are selected respectively The color range of specific color dots in each color version of the yellow version is copied and transferred to the metal color version and filled with white, so that the black area of the metal color version that is not filled with white forms a negative dot area, which includes the following: Through the computer image The processing method selects the official black dot color range in the black version to copy and transfer to the metal color version, and transfers and copies the official black dot color range in the metal color version to fill in white; through the computer image processing method to select the official in the cyan version Copy and transfer the cyan dot color range to the metal version, and transfer and copy the official cyan dot color range in the metal version. Fill in white; use the computer's image processing method to select the official magenta dot color range in the magenta version. Go to the metal color version, and transfer and copy the official magenta dot color range in the metal color version, fill it with white; select the official yellow dot color range in the yellow version through the computer image processing method, copy and transfer to the metal color version, and Transfer and copy the formal yellow dot color range in the metal color version and fill it with white; and set the black area of the metal color version that is not filled with white as the negative dot region through the image processing method of the computer. The positive-negative type dot mixed plate-making printing method as described in claim 5, wherein the printing machine executes the to-be-printed product according to the input negative type dot area of the metallic color plate and the dot data of the four primary color plates In the steps of positive and negative dot printing, the publisher performs the negative dots with the metallic ink before the part of the to-be-printed product corresponding to the negative dot area according to the processed metal color plate data with the negative dot area. The printing action is followed by the official dot printing action on the to-be-printed product according to the dot data of the black version, the cyan version, the magenta version and the yellow version. The positive-negative dot mixed plate-making printing method according to claim 6, wherein the metallic ink is silver metallic ink or golden metallic ink.

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