Gravure printing now plays an increasingly important role in the packaging and printing industry in China. At the same time, due to the decisive effect of the quality of gravure production on the quality of gravure printing, the requirements of printing manufacturers for plate making manufacturers are getting higher and higher. How to make a high-quality printing plate to meet the needs of customers to become ever-changing, has become a difficult problem for many plate-making manufacturers in China. This paper only considers several different plate-making methods adopted in the same plate-making problem in the field, with thin lines and the same color due to different customer requirements. We would like to see you as a small reader and share with colleagues in the platemaking industry to explore their subtleties in order to give Your enlightenment.
We know that the manuscripts provided by customers are various. Sometimes, the analysis of the manuscript provided by the customer reveals that a single color includes both large color blocks, ie, large areas (hereinafter referred to as part A), and extremely thin lines or line networks (extremely high light, such as 5% or less (Potents) etc. (hereinafter referred to as Part B), the customer requested that the color of the field part should be deep, and high saturation and density values ​​should be achieved; Part B requires the thin lines to be particularly light, and the line network should not lose dots.
For this situation, it can be analyzed: A and B are two patterns that are absolutely opposite to each other. The process conditions for obtaining the best printing effect during printing are also different, such as the printing pressure, the viscosity of the ink, and the control of the doctor blade. In order to obtain a better printing effect, customers can be recommended to use different plate-making techniques. The following will introduce four different plate-making solutions.
The first platemaking process plan: the color is divided into two colors, one for the A version, one for the B version, the color printing, to restore the original purpose. However, if the customer's printer color group is limited, or the version is short-lived, or the customer's machine color registration accuracy is poor, and A and B slightly deviate from the color, the printed product is very obvious... One, then the first plan will lose its effectiveness. We consider the second option.
We know that there are several kinds of engraving needles such as 90°, 100°, 110°, 120°, 130°, and 145°. There are several types of screens from 32 to 2001pi (different types of screens in different models). The angle is small, and the number of lines is coarse (small value), the engraving depth is large, and the network hole is large; on the contrary, the angle of the engraving needle is large, and the number of lines is small, the depth is small, and the volume of the network hole is small. According to this principle, adjusting the electric carving process and making a monochrome version can solve this problem. That is, when sculpting, one film is scanned twice and carved twice. When scanning part A at a time, the number of lines in the engraving is thicker and the angle of the needle is smaller in order to increase the amount of ink on part A and reach the customer's request. Perform a scan on Part B, with finer lines and larger needles. Of course, there is no film engraving. This method solves the three problems of the first scheme, but it has higher requirements for the technical level of the printing staff, and the requirements for the plate making are higher and more complicated.
If the effect of part A of the two schemes is not satisfactory to the customer, part A must find another way to achieve a higher amount of ink. That is, the third and fourth solutions can be adopted.
The third scheme r A corrosion version, B engraving, overprinting is completed. Corrosion can easily allow customers to be satisfied with the results on the ground. However, since corrosion and electricity are different ways of making plates, the engraving machine without seams is very simple. For A and B overprinting, the corrosion must also be a seamless etching process, which puts a high demand on the plate-making personnel. The request. To reduce corrosion requirements. And reduce costs, reduce the amount of version 4, can use the fourth program.
The fourth scheme is to first sculpt and then to etch. The specific approach is to first use the second scheme engraving. Then, special equipment was used to apply the anti-corrosion ink, so that the entire layout of the net city and B part of the ink, and then etch A to the appropriate depth.
As can be seen from the above four solutions, due to different customer requirements, plate-making manufacturers can come up with different process solutions to meet, and different process solutions are also difficult. However, in order to meet the needs of customers, we would like to take a place in the gravure platemaking market, where platemaking manufacturers should use their brains, think about what customers want, hurry their customers, and improve their quality and time. The best process solution solves every problem for the customer. Only in this way can the necessary benefits be achieved.
We know that the manuscripts provided by customers are various. Sometimes, the analysis of the manuscript provided by the customer reveals that a single color includes both large color blocks, ie, large areas (hereinafter referred to as part A), and extremely thin lines or line networks (extremely high light, such as 5% or less (Potents) etc. (hereinafter referred to as Part B), the customer requested that the color of the field part should be deep, and high saturation and density values ​​should be achieved; Part B requires the thin lines to be particularly light, and the line network should not lose dots.
For this situation, it can be analyzed: A and B are two patterns that are absolutely opposite to each other. The process conditions for obtaining the best printing effect during printing are also different, such as the printing pressure, the viscosity of the ink, and the control of the doctor blade. In order to obtain a better printing effect, customers can be recommended to use different plate-making techniques. The following will introduce four different plate-making solutions.
The first platemaking process plan: the color is divided into two colors, one for the A version, one for the B version, the color printing, to restore the original purpose. However, if the customer's printer color group is limited, or the version is short-lived, or the customer's machine color registration accuracy is poor, and A and B slightly deviate from the color, the printed product is very obvious... One, then the first plan will lose its effectiveness. We consider the second option.
We know that there are several kinds of engraving needles such as 90°, 100°, 110°, 120°, 130°, and 145°. There are several types of screens from 32 to 2001pi (different types of screens in different models). The angle is small, and the number of lines is coarse (small value), the engraving depth is large, and the network hole is large; on the contrary, the angle of the engraving needle is large, and the number of lines is small, the depth is small, and the volume of the network hole is small. According to this principle, adjusting the electric carving process and making a monochrome version can solve this problem. That is, when sculpting, one film is scanned twice and carved twice. When scanning part A at a time, the number of lines in the engraving is thicker and the angle of the needle is smaller in order to increase the amount of ink on part A and reach the customer's request. Perform a scan on Part B, with finer lines and larger needles. Of course, there is no film engraving. This method solves the three problems of the first scheme, but it has higher requirements for the technical level of the printing staff, and the requirements for the plate making are higher and more complicated.
If the effect of part A of the two schemes is not satisfactory to the customer, part A must find another way to achieve a higher amount of ink. That is, the third and fourth solutions can be adopted.
The third scheme r A corrosion version, B engraving, overprinting is completed. Corrosion can easily allow customers to be satisfied with the results on the ground. However, since corrosion and electricity are different ways of making plates, the engraving machine without seams is very simple. For A and B overprinting, the corrosion must also be a seamless etching process, which puts a high demand on the plate-making personnel. The request. To reduce corrosion requirements. And reduce costs, reduce the amount of version 4, can use the fourth program.
The fourth scheme is to first sculpt and then to etch. The specific approach is to first use the second scheme engraving. Then, special equipment was used to apply the anti-corrosion ink, so that the entire layout of the net city and B part of the ink, and then etch A to the appropriate depth.
As can be seen from the above four solutions, due to different customer requirements, plate-making manufacturers can come up with different process solutions to meet, and different process solutions are also difficult. However, in order to meet the needs of customers, we would like to take a place in the gravure platemaking market, where platemaking manufacturers should use their brains, think about what customers want, hurry their customers, and improve their quality and time. The best process solution solves every problem for the customer. Only in this way can the necessary benefits be achieved.
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