A flexographic printing milk carton printing control strip

Abstract

The invention discloses a flexographic printing measuring and controlling strip for milk packaging boxes, comprising 4 solid color block density calibration areas; 4 50% hue dot enlargement monitoring areas; 4 20% hue dot restoration visual observation areas; 4 2% hue dot enlargement monitoring areas; the flexographic printing measuring and controlling strip for milk packaging boxes presents a square array structure, with 4 rows and 4 columns, and 16 calibration areas in total, each calibration area is a square block with a width of 10 to 5 mm, used for color presentation of different calibration features, and the feature value indicated by each calibration feature area is a specified value; the invention can be used for multiple control links such as flexographic printing equipment calibration, printing process standardization control, milk package printed product production process quality control, etc., has a simple principle, is easy to use, and is convenient for actual industrial production application and promotion.

Description

Technical Field

[0001] 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 Art

[0002] With the continuous advancement of science and technology, the quality requirements of color packaging and printing products are also constantly improving. In view of the characteristics of printing control of flexographic printing packaging products, combined with the production characteristics of milk beverage packaging boxes (referred to as milk bags), it is necessary to use certain measurement and control strips for monitoring and management, namely printing measurement and control strips. Printing measurement and control strips are designed with specific areas and geometric shapes to monitor the quality of printed products for visual inspection or measurement and identification. They are important tools for digital measurement and control of printing quality and quality control.

[0003] Currently, the existing measurement and control strips used for packaging products are mostly for offset printing packaging products and flexographic packaging printing, especially for milk bags. Most of the printing measurement and control strips currently use the offset printing measurement and control strip structure for flexographic printing products, which are often inconvenient to use or not very targeted. Therefore, the present invention aims at the characteristics of flexographic printing and combines the special requirements of milk bag printing production. It has a simple structure and is easy to use, and is more suitable for the control of flexible milk bag products. Summary of the invention

[0004] The object of the present invention is to provide a printing measurement and control strip for a milk packaging box printed by flexographic printing, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A flexographic printing measuring and control strip for milk packaging boxes, including 4 solid color block density calibration areas; 4 50% hue dot gain monitoring areas; 4 20% hue dot restoration visual observation areas; 4 2% hue dot gain monitoring areas;

[0007] The printing control strips of the flexographically printed milk cartons are in a square array structure, with 4 rows and 4 columns, and a total of 16 calibration areas. Each calibration area is a square block with a width of 10 to 5 mm, which is used to present the colors of different calibration features. The feature value indicated in each calibration feature area is the specified value.

[0008] Further, the four solid color block density calibration areas include: a yellow density calibration area 1-1 with a dot area rate of 100%, whose calibration value is the optimal density value of solid yellow during the printing process; a magenta density calibration area 1-2 with a dot area rate of 100%, whose calibration value is the optimal density value of solid magenta during the printing process; a cyan density calibration area 1-3 with a dot area rate of 100%, whose calibration value is the optimal density value of solid cyan during the printing process; a black density calibration area 1-4 with a dot area rate of 100%, whose calibration value is the optimal density value of solid black during the printing process;

[0009] Further, the four 50% hue dot gain monitoring areas include: a yellow dot gain monitoring area 2-1 with a dot area of ​​50%, whose calibration value is that the dot area rate change range of 50% yellow in the flexographic printing process control is 64%±4%; a magenta dot gain monitoring area 2-2 with a dot area of ​​50%, whose calibration value is that the dot area rate change range of 50% magenta in the flexographic printing process control is 64%±4%; a cyan dot gain monitoring area 2-3 with a dot area of ​​50%, whose calibration value is that the dot area rate change range of 50% cyan in the flexographic printing process control is 64%±4%; a black dot gain monitoring area 2-4 with a dot area of ​​50%, whose calibration value is that the dot area rate change range of 50% black in the flexographic printing process control is 64%±4%;

[0010] Furthermore, the four 20% tone dot reproduction visual observation areas include: a yellow tone dot reproduction visual observation area 3-1 with a dot area ratio of 20%; a magenta tone dot reproduction visual observation area 3-2 with a dot area ratio of 20%; a cyan tone dot reproduction visual observation area 3-3 with a dot area ratio of 20%; and a black tone dot reproduction visual observation area 3-4 with a dot area ratio of 20%.

[0011] Further, the four 2% hue dot gain monitoring areas include: a yellow hue dot gain monitoring area 4-1 with a dot area of ​​2%, whose calibration value is that the dot area rate change value range of 2% yellow in the flexographic printing process control is 8% to 12%; a magenta hue dot gain monitoring area 4-2 with a dot area of ​​2%, whose calibration value is that the dot area rate change value range of 2% magenta in the flexographic printing process control is 8% to 12%; a cyan hue dot gain monitoring area 4-3 with a dot area of ​​2%, whose calibration value is that the dot area rate change value range of 2% cyan in the flexographic printing process control is 8% to 12%; a black hue dot gain monitoring area 4-4 with a dot area of ​​2%, whose calibration value is that the dot area rate change value range of 2% black in the flexographic printing process control is 8% to 12%;

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The invention designs dot enlargement characteristic points for printing process control according to the ink density standard of solid color of flexographic printing; the invention uses data indicators combined with visual observation to analyze the printing effect of flexographic printing milk package products and guide the flexographic printing process control; the invention has a simple principle and is easy and convenient to use. The invention can be used in multiple control links such as flexographic printing equipment calibration, printing process standardization control, and milk package print production process quality control, and is convenient for actual industrial production application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the structure of a printing measurement and control strip for a flexographically printed milk packaging box.

[0015] Figure 2 The present invention is a flow chart of a method for using a printing measurement and control strip for a flexographically printed milk packaging box.

[0016] Reference numerals:

[0017] 1-1, yellow solid color block density calibration area;

[0018] 1-2, magenta solid color block density calibration area;

[0019] 1-3, cyan solid color block density calibration area;

[0020] 1-4, black solid color block density calibration area;

[0021] 2-1, Yellow 50% tone dot gain monitoring area;

[0022] 2-2, magenta 50% hue dot gain monitoring area;

[0023] 2-3, cyan 50% tone dot gain monitoring area;

[0024] 2-4, black 50% tone dot gain monitoring area;

[0025] 3-1. Visually observe the dot reduction area with a 20% yellow hue;

[0026] 3-2. Visually observe the dot reduction area with a 20% tone of magenta;

[0027] 3-3, 20% cyan tone visually observes the dot reduction area;

[0028] 3-4. Visually observe the dot reduction area at 20% black tone;

[0029] 4-1, Yellow 2% hue dot gain monitoring area;

[0030] 4-2, magenta 2% hue dot gain monitoring area;

[0031] 4-3, cyan 2% tone dot gain monitoring area;

[0032] 4-4. Black 2% tone dot gain monitoring area. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0034] See also Figure 1-2 A flexographic printing measurement and control strip for milk packaging boxes includes 4 solid color block density calibration areas; 4 50% hue dot gain monitoring areas; 4 20% hue dot restoration visual observation areas; and 4 2% hue dot gain monitoring areas.

[0035] The printing control strips of the flexographically printed milk cartons are in a square array structure, with 4 rows and 4 columns, and a total of 16 calibration areas. Each calibration area is a square block with a width of 10 to 5 mm, which is used to present the colors of different calibration features. The feature value indicated in each calibration feature area is the specified value.

[0036] The four solid color block density calibration areas include: a yellow density calibration area 1-1 with a dot area rate of 100%, whose calibration value is the optimal density value of solid yellow during printing; a magenta density calibration area 1-2 with a dot area rate of 100%, whose calibration value is the optimal density value of solid magenta during printing; a cyan density calibration area 1-3 with a dot area rate of 100%, whose calibration value is the optimal density value of solid cyan during printing; a black density calibration area 1-4 with a dot area rate of 100%, whose calibration value is the optimal density value of solid black during printing;

[0037] The four 50% hue dot gain monitoring areas include: a yellow dot gain monitoring area 2-1 with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% yellow in the flexographic printing process control of 64%±4%; a magenta dot gain monitoring area 2-2 with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% magenta in the flexographic printing process control of 64%±4%; a cyan dot gain monitoring area 2-3 with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% cyan in the flexographic printing process control of 64%±4%; a black dot gain monitoring area 2-4 with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% black in the flexographic printing process control of 64%±4%;

[0038] The four 20% tone dot reproduction visual observation areas include: a yellow tone dot reproduction visual observation area 3-1 with a dot area ratio of 20%; a magenta tone dot reproduction visual observation area 3-2 with a dot area ratio of 20%; a cyan tone dot reproduction visual observation area 3-3 with a dot area ratio of 20%; and a black tone dot reproduction visual observation area 3-4 with a dot area ratio of 20%;

[0039] The four 2% hue dot gain monitoring areas include: a yellow hue dot gain monitoring area 4-1 with a dot area of ​​2%, the calibration value of which is the dot area rate change value range of 8% to 12% for 2% yellow in the process control of flexographic printing; a magenta hue dot gain monitoring area 4-2 with a dot area of ​​2%, the calibration value of which is the dot area rate change value range of 8% to 12% for 2% magenta in the process control of flexographic printing; a cyan hue dot gain monitoring area 4-3 with a dot area of ​​2%, the calibration value of which is the dot area rate change value range of 8% to 12% for 2% cyan in the process control of flexographic printing; a black hue dot gain monitoring area 4-4 with a dot area of ​​2%, the calibration value of which is the dot area rate change value range of 8% to 12% for 2% black in the process control of flexographic printing;

[0040] The present invention is implemented as Figure 2 As shown, the measurement and control strip of the present invention is added to the conventional flexographic printing milk bag product, and the normal printing control is performed, specifically including the following steps:

[0041] S1. Add a flexographic printing milk packaging box printing measurement and control strip to the traditional flexographic printing milk package product document, and print the present invention on the milk package print through normal printing process control.

[0042] S2. The printed measurement and control strips of the flexographically printed milk packaging box on the printed product are analyzed by measuring instruments and visual observation. If the value detected by the instrument, such as the solid density value measurement result of a certain color, is consistent with the value indicated by the present invention, the printing process is executed, and printed sheets are repeatedly extracted from the printed product for testing and observation of the product of the present invention until the entire printing process is completed.

[0043] S3. If the test result of the instrument is inconsistent with the marked value of the printing control strip of the flexographic printing milk carton, such as the dot gain value of the 50% gradation of a certain color exceeds the marked value, then the parameters and methods of printing adjustment are determined according to the size of the exceeded value, and the adjustment parameters of the printing process control are fed back to the printing part to adjust the printing process.

[0044] S4, the adjusted printing part, again carries out the test and analysis of the product of the present invention on the milk bag printed material, until the test value and the observation result are consistent with the value indicated by the present invention, can normal printing be carried out, until the whole product printing is completed.

[0045] The invention designs dot enlargement characteristic points for printing process control according to the ink density standard of solid color of flexographic printing; the invention uses data indicators combined with visual observation to analyze the printing effect of flexographic printing milk package products and guide the flexographic printing process control; the invention has a simple principle and is easy and convenient to use. The invention can be used in multiple control links such as flexographic printing equipment calibration, printing process standardization control, and milk package print production process quality control, and is convenient for actual industrial production application and promotion.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flexographic printing measuring and control strip for milk packaging, characterized in that: Includes 4 solid color block density calibration areas; 4 50% hue dot gain monitoring areas; 4 20% hue dot restoration visual observation areas; 4 2% hue dot gain monitoring areas; The measurement and control strips printed on the flexographic printing of milk packaging boxes are in a square array structure, with 4 rows and 4 columns, and a total of 16 calibration areas. Each calibration area is a square block with a width of 10~5mm, which is used for the color presentation of different calibration features. The feature value marked in each calibration feature area is the specified value; The four solid color block density calibration areas include: a yellow density calibration area (1-1) with a dot area rate of 100%, whose calibration value is the optimal density value of solid yellow during printing; a magenta density calibration area (1-2) with a dot area rate of 100%, whose calibration value is the optimal density value of solid magenta during printing; a cyan density calibration area (1-3) with a dot area rate of 100%, whose calibration value is the optimal density value of solid cyan during printing; and a black density calibration area (1-4) with a dot area rate of 100%, whose calibration value is the optimal density value of solid black during printing; The four 50% hue dot gain monitoring areas include: a yellow dot gain monitoring area (2-1) with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% yellow in the flexographic printing process control of 64%±4%; a magenta dot gain monitoring area (2-2) with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% magenta in the flexographic printing process control of 64%±4%; a cyan dot gain monitoring area (2-3) with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% cyan in the flexographic printing process control of 64%±4%; a black dot gain monitoring area (2-4) with a dot area of ​​50%, the calibration value of which is the dot area rate change range of 50% black in the flexographic printing process control of 64%±4%; The four 20% tone dot restoration visual observation areas include: a yellow tone dot restoration visual observation area (3-1) with a dot area ratio of 20%; a magenta tone dot restoration visual observation area (3-2) with a dot area ratio of 20%; a cyan tone dot restoration visual observation area (3-3) with a dot area ratio of 20%; and a black tone dot restoration visual observation area (3-4) with a dot area ratio of 20%. The four 2% hue dot gain monitoring areas include: a yellow hue dot gain monitoring area (4-1) with a dot area of ​​2%, the calibration value of which is the range of 8% to 12% of the dot area rate change value of 2% yellow in the flexographic printing process control; a magenta hue dot gain monitoring area (4-2) with a dot area of ​​2%, the calibration value of which is the range of 8% to 12% of the dot area rate change value of 2% magenta in the flexographic printing process control; a cyan hue dot gain monitoring area (4-3) with a dot area of ​​2%, the calibration value of which is the range of 8% to 12% of the dot area rate change value of 2% cyan in the flexographic printing process control; a black hue dot gain monitoring area (4-4) with a dot area of ​​2%, the calibration value of which is the range of 8% to 12% of the dot area rate change value of 2% black in the flexographic printing process control; The printing control strip is attached to the conventional flexographic printing milk bag product, and the normal printing control is performed, specifically including the following steps: S1. Add a flexographic printing milk packaging box printing control strip to the traditional flexographic printing milk package product file, and print the printing control strip on the milk package product through normal printing process control; S2. Analyze the printed control strips of the flexographic printing on the milk packaging products through measuring instruments and visual observation. When the solid density value measurement result of a certain color is consistent with the value indicated by the printed control strips, the printing process is executed, and the printed sheets are repeatedly extracted from the printed products to test and observe the printed control strips until the entire printing process is completed; S3. When the dot gain value of the 50% tone of a certain color exceeds the indicated value, the parameters and methods of printing adjustment are determined according to the size of the exceeded value, and the adjustment parameters of the printing process control are fed back to the printing part to adjust the printing process; S4. After the adjustment, the printing part will be tested and analyzed again on the printing control strip on the milk bag product. Normal printing can be carried out until the test value and the observation result are consistent with the value indicated on the printing control strip. The whole product printing is completed.

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