阅读说明：本技术 一种柔性版印刷的牛奶包装盒印刷测控条 (Milk packing carton printing measurement and control strip of flexography ) 是由 田全慧 陈浩粟 王槐明 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种柔性版印刷的牛奶包装盒印刷测控条,包括4个实地色色块密度标定区；4个50％的色调网点增大监控区；4个20％的色调网点还原视觉观察区；4个2％的色调网点增大监控区；柔性版印刷的牛奶包装盒印刷测控条呈正方形阵列结构,一共4行、4列,共十六个标定区域,每一个标定区域为宽度在10～5mm的方形块,用于不同标定特征的颜色呈现,每个标定特征区域所标示的特征数值为规定的数值；本发明可以用于柔印印刷设备校正、印刷过程标准化控制、奶包印刷品生产过程质量控制等多个控制环节,原理简单,使用方便,便于实际工业生产应用和推广。(The invention discloses a flexographic printing milk packing box printing measurement and control strip, which comprises 4 real color block density calibration areas; 4 50% of tone screen dot increase monitoring areas; 4, reducing the visual observation area by 20% of tone dots; 4 2% tone screen dot increase monitoring areas; the printing and control strip of the flexographic printing milk packing box is of a square array structure, and has 4 rows and 4 columns in total and sixteen calibration areas, wherein each calibration area is a square block with the width of 10-5 mm and is used for displaying colors of different calibration characteristics, and the characteristic value marked in each calibration characteristic area is a specified value; the method can be used for a plurality of control links such as correction of the flexible printing equipment, standardized control of the printing process, quality control of the production process of the milk-coated printed matter and the like, has simple principle and convenient use, and is convenient for application and popularization in actual industrial production.)

1. A milk packing box printing measurement and control strip of flexography, characterized by, include 4 real color lump density calibration areas; 4 50% of tone screen dot increase monitoring areas; 4, reducing the visual observation area by 20% of tone dots; 4 2% tone screen dot increase monitoring areas;

the printing and control strip of the flexographic printing milk packing box is of a square array structure, and has 4 rows and 4 columns in total and sixteen calibration areas, wherein each calibration area is a square block with the width of 10-5 mm and is used for displaying the colors of different calibration characteristics, and the characteristic value marked in each calibration characteristic area is a specified value.

2. The printing test and control strip for the flexographic printing milk packing box according to claim 1, wherein the 4 real color block density calibration areas comprise: a yellow density calibration area 1-1 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid yellow in the printing process; a magenta density calibration area 1-2 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid magenta in the printing process; a cyan density calibration area 1-3 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid cyan in the printing process; and black density calibration areas 1-4 with the dot area rate of 100% and calibration values of the black density calibration areas are the optimal density values of solid black in the printing process.

3. A flexographic printing milk carton printing test strip according to claim 1 wherein said 4 50% tonal dot gain monitoring areas comprise: a yellow dot gain monitoring area 2-1 with a dot area of 50 percent, wherein the calibration value of the yellow dot gain monitoring area is that the dot area rate change value range of 50 percent of yellow is 64 percent +/-4 percent in the process of controlling the flexographic printing; the area of the magenta dot with the dot area of 50% is enlarged in the monitoring area 2-2, and the calibration value of the area rate change value range of the magenta dot with the dot area of 50% in the process of controlling the flexographic printing is 64% +/-4%; a cyan dot gain monitoring area 2-3 with a dot area of 50%, wherein the calibration value of the cyan dot gain monitoring area is that the dot area rate change value range of 50% cyan in the process of controlling the flexographic printing is 64% +/-4%; and the black dot area increasing monitoring area 2-4 with the dot area of 50% has a calibration value that the change value range of the dot area rate of 50% black in the process of controlling the flexographic printing is 64% +/-4%.

4. A flexographic printing milk carton printing test strip according to claim 1 wherein said 4 20% tonal dot reduction visual field of view comprises: the yellow hue screen dots with the screen dot area rate of 20 percent restore the visual observation area 3-1; a visual observation area 3-2 is restored by magenta hue dots with the dot area rate of 20%; a cyan hue screen dot reduction visual observation area 3-3 with the screen dot area rate of 20%; and the black tone screen dots with the screen dot area rate of 20 percent restore the visual observation area 3-4.

5. A flexographic printing milk packaging box printing test strip according to claim 1 wherein said 4 2% tone dot gain monitoring areas comprise: a yellow hue dot gain monitoring area 4-1 with the dot area of 2 percent, wherein the calibration value of the yellow hue dot gain monitoring area is that the dot area rate change value range of 2 percent yellow is 8-12 percent in the process of controlling the flexographic printing; a magenta hue dot gain monitoring area 4-2 with the dot area of 2 percent, wherein the calibration value of the magenta hue dot gain monitoring area is 8 to 12 percent of the dot area rate change value range of 2 percent of magenta in the process of controlling the flexographic printing; a cyan hue dot gain monitoring area 4-3 with the dot area of 2 percent, wherein the calibration value of the cyan hue dot gain monitoring area is that the dot area rate change value range of 2 percent cyan in the process of controlling the flexographic printing is 8-12 percent; the black tone screen dot increase monitoring area 4-4 with the screen dot area of 2% has a calibration value that the screen dot area rate change value range of 2% black in the process of flexographic printing is 8% -12%.

Technical Field

The invention relates to the field of flexographic printing, in particular to a printing measurement and control strip for a milk packaging box of flexographic printing.

Background

With the continuous progress of science and technology, the quality requirements of color package printed matters are continuously improved, wherein certain measurement and control strips are needed to be adopted for monitoring and management aiming at the characteristics of package printing control of flexographic printing and the manufacturing characteristics of milk beverage packaging boxes (milk bags for short), namely the measurement and control strips are printed. The printing measurement and control strip is designed by using a specific area and a geometric figure, is used for monitoring the quality of a printed product, is used for visual inspection or measurement and identification, and is an important tool for datamation measurement and control and quality control of printing quality.

The existing measurement and control strips for packaging products at present are mostly used for offset printing packaging products and flexographic packaging printing, particularly, the existing measurement and control strips for printing milk bags are mostly used for flexographic printing products by virtue of an offset printing measurement and control strip structure, and have the characteristics of inconvenient use, poor pertinence and the like.

Disclosure of Invention

The invention aims to provide a flexographic printing milk packing box printing measurement and control strip to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a milk packing box printing measurement and control strip of flexography, include 4 real color lump density calibration areas; 4 50% of tone screen dot increase monitoring areas; 4, reducing the visual observation area by 20% of tone dots; 4 2% tone screen dot increase monitoring areas;

the printing and control strip of the flexographic printing milk packing box is of a square array structure, and has 4 rows and 4 columns in total and sixteen calibration areas, wherein each calibration area is a square block with the width of 10-5 mm and is used for displaying the colors of different calibration characteristics, and the characteristic value marked in each calibration characteristic area is a specified value.

Further, the 4 real color block density calibration areas comprise: a yellow density calibration area 1-1 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid yellow in the printing process; a magenta density calibration area 1-2 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid magenta in the printing process; a cyan density calibration area 1-3 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid cyan in the printing process; black density calibration areas 1-4 with the dot area rate of 100 percent, wherein the calibration value is the optimal density value of solid black in the printing process;

further, the 4 tone dot gain monitoring areas of 50% include: a yellow dot gain monitoring area 2-1 with a dot area of 50 percent, wherein the calibration value of the yellow dot gain monitoring area is that the dot area rate change value range of 50 percent of yellow is 64 percent +/-4 percent in the process of controlling the flexographic printing; the area of the magenta dot with the dot area of 50% is enlarged in the monitoring area 2-2, and the calibration value of the area rate change value range of the magenta dot with the dot area of 50% in the process of controlling the flexographic printing is 64% +/-4%; a cyan dot gain monitoring area 2-3 with a dot area of 50%, wherein the calibration value of the cyan dot gain monitoring area is that the dot area rate change value range of 50% cyan in the process of controlling the flexographic printing is 64% +/-4%; a black dot gain monitoring area 2-4 with a dot area of 50%, wherein the calibration value of the black dot area rate change value range of 50% black in the process of controlling the flexographic printing is 64% +/-4%;

further, the 4 20% tone dot reduction visual observation regions comprise: the yellow hue screen dots with the screen dot area rate of 20 percent restore the visual observation area 3-1; a visual observation area 3-2 is restored by magenta hue dots with the dot area rate of 20%; a cyan hue screen dot reduction visual observation area 3-3 with the screen dot area rate of 20%; reducing the black tone screen dots with the screen dot area rate of 20% to a visual observation area 3-4;

further, the 4 2% tone dot gain monitoring regions include: a yellow hue dot gain monitoring area 4-1 with the dot area of 2 percent, wherein the calibration value of the yellow hue dot gain monitoring area is that the dot area rate change value range of 2 percent yellow is 8-12 percent in the process of controlling the flexographic printing; a magenta hue dot gain monitoring area 4-2 with the dot area of 2 percent, wherein the calibration value of the magenta hue dot gain monitoring area is 8 to 12 percent of the dot area rate change value range of 2 percent of magenta in the process of controlling the flexographic printing; a cyan hue dot gain monitoring area 4-3 with the dot area of 2 percent, wherein the calibration value of the cyan hue dot gain monitoring area is that the dot area rate change value range of 2 percent cyan in the process of controlling the flexographic printing is 8-12 percent; a black tone screen dot increase monitoring area 4-4 with the screen dot area of 2 percent, wherein the calibration value of the screen dot area increase monitoring area is 8-12 percent of the screen dot area rate change value range of 2 percent of black in the process of controlling the flexographic printing;

compared with the prior art, the invention has the beneficial effects that:

according to the density standard of the ink of the real ground color of the flexographic printing, the design of the dot gain characteristic points controlled in the printing process is carried out; the method analyzes the printing effect of the flexographic printing milk bag product by combining the data indexes with visual observation, and guides the control of the flexographic printing process; the method has simple principle and simple and convenient use, can be used for a plurality of control links such as correction of flexo printing equipment, standardized control of printing process, quality control of milk bag printed matter production process and the like, and is convenient for application and popularization of actual industrial production.

Drawings

Fig. 1 is a schematic structural diagram of a flexographic printing milk packing box printing measurement and control strip.

FIG. 2 is a flow chart of a method for using a flexographic milk carton printing test strip.

Reference numerals:

1-1, a yellow-solid ground color block density calibration area;

1-2, a magenta real color block density calibration area;

1-3, a green real color block density calibration area;

1-4, a black solid color block density calibration area;

2-1, yellow 50% hue dot increase monitoring area;

2-2, a monitoring area is enlarged by 50% magenta color tone dots;

2-3, a hue screen dot increase monitoring area of 50% cyan;

2-4, black 50% color tone screen dot increase monitoring area;

3-1, and visually observing the dot reduction area with 20% yellow color;

3-2, visually observing the dot reduction area with 20% of magenta color;

3-3, and a halftone dot reduction region is observed visually with 20% of cyan;

3-4, black 20% color tone visual observation screen point reduction area;

4-1, 2% yellow color tone screen dot increase monitoring area;

4-2, 2% magenta color tone dot enlarging monitoring area;

4-3, a 2% cyan hue dot increase monitoring area;

4-4, black 2% color tone screen dot increase monitoring area.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a flexographic printing milk packing box printing test strip includes 4 real color block density calibration areas; 4 50% of tone screen dot increase monitoring areas; 4, reducing the visual observation area by 20% of tone dots; 4 tone dots of 2% increase the monitoring zone.

The printing and control strip of the flexographic printing milk packing box is of a square array structure, and has 4 rows and 4 columns in total and sixteen calibration areas, wherein each calibration area is a square block with the width of 10-5 mm and is used for displaying the colors of different calibration characteristics, and the characteristic value marked in each calibration characteristic area is a specified value.

The 4 real color block density calibration areas comprise: a yellow density calibration area 1-1 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid yellow in the printing process; a magenta density calibration area 1-2 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid magenta in the printing process; a cyan density calibration area 1-3 with the dot area rate of 100%, wherein the calibration value is the optimal density value of solid cyan in the printing process; black density calibration areas 1-4 with the dot area rate of 100 percent, wherein the calibration value is the optimal density value of solid black in the printing process;

the 4 tone dot gain monitoring areas of 50% include: a yellow dot gain monitoring area 2-1 with a dot area of 50 percent, wherein the calibration value of the yellow dot gain monitoring area is that the dot area rate change value range of 50 percent of yellow is 64 percent +/-4 percent in the process of controlling the flexographic printing; the area of the magenta dot with the dot area of 50% is enlarged in the monitoring area 2-2, and the calibration value of the area rate change value range of the magenta dot with the dot area of 50% in the process of controlling the flexographic printing is 64% +/-4%; a cyan dot gain monitoring area 2-3 with a dot area of 50%, wherein the calibration value of the cyan dot gain monitoring area is that the dot area rate change value range of 50% cyan in the process of controlling the flexographic printing is 64% +/-4%; a black dot gain monitoring area 2-4 with a dot area of 50%, wherein the calibration value of the black dot area rate change value range of 50% black in the process of controlling the flexographic printing is 64% +/-4%;

the 4 20% tone dot reduction visual observation regions include: the yellow hue screen dots with the screen dot area rate of 20 percent restore the visual observation area 3-1; a visual observation area 3-2 is restored by magenta hue dots with the dot area rate of 20%; a cyan hue screen dot reduction visual observation area 3-3 with the screen dot area rate of 20%; reducing the black tone screen dots with the screen dot area rate of 20% to a visual observation area 3-4;

the 4 2% tone dot gain monitoring areas include: a yellow hue dot gain monitoring area 4-1 with the dot area of 2 percent, wherein the calibration value of the yellow hue dot gain monitoring area is that the dot area rate change value range of 2 percent yellow is 8-12 percent in the process of controlling the flexographic printing; a magenta hue dot gain monitoring area 4-2 with the dot area of 2 percent, wherein the calibration value of the magenta hue dot gain monitoring area is 8 to 12 percent of the dot area rate change value range of 2 percent of magenta in the process of controlling the flexographic printing; a cyan hue dot gain monitoring area 4-3 with the dot area of 2 percent, wherein the calibration value of the cyan hue dot gain monitoring area is that the dot area rate change value range of 2 percent cyan in the process of controlling the flexographic printing is 8-12 percent; a black tone screen dot increase monitoring area 4-4 with the screen dot area of 2 percent, wherein the calibration value of the screen dot area increase monitoring area is 8-12 percent of the screen dot area rate change value range of 2 percent of black in the process of controlling the flexographic printing;

as shown in figure 2, the measurement and control strip is added to the traditional flexographic printing milk bag product, and the method specifically comprises the following steps through normal printing control:

s1, adding a flexographic printing milk packing box printing measurement and control strip on a traditional flexographic printing milk bag product file, and printing the milk bag product file on a milk bag printed product through normal printing process control.

S2, analyzing the printing test and control strip of the milk packing box printed by the flexible plate on the printed matter through a measuring instrument and visual observation, if the numerical value detected by the instrument, such as the solid density value measurement result of a certain color is consistent with the numerical value marked by the invention, executing the printing process, and repeatedly extracting the printed sheet from the printed product for many times to test and observe the product of the invention until the whole printing process is finished.

S3, if the result of the instrument test is not consistent with the marked value of the printing measurement and control strip of the flexographic printing milk packing box, if the dot gain value of 50% tone of a certain color exceeds the marked value, judging the parameters and modes of printing adjustment according to the value exceeding the value, feeding back the adjustment parameters of printing process control to the printing part, and adjusting the printing process.

And S4, testing and analyzing the product on the milk bag printed product again by the adjusted printing part until the test value and the observation result accord with the value marked by the invention, and normally printing until the whole product is printed.

According to the density standard of the ink of the real ground color of the flexographic printing, the design of the dot gain characteristic points controlled in the printing process is carried out; the method analyzes the printing effect of the flexographic printing milk bag product by combining the data indexes with visual observation, and guides the control of the flexographic printing process; the method has simple principle and simple and convenient use, can be used for a plurality of control links such as correction of flexo printing equipment, standardized control of printing process, quality control of milk bag printed matter production process and the like, and is convenient for application and popularization of actual industrial production.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.