Control the pass rate of the printed version of the machine, which can effectively improve the profit
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Offset printing, especially in the offset printing industry, is most sensitive to the problem of chromatic aberrations in print production, because the chromatic aberration of printing can cause fatal losses to the production of the company, or even lose customers.
Why are offset packaging products so sensitive to printing chromatic aberration? We all know that in all color packaging forms, offset packaging products are the most high-end printing methods, so customers will have higher expectations for the quality of printing, so he can not have any bad phenomena.
Moreover, all packaging products are large-volume products. Therefore, the printing batch size is large, and the number of times of printing is large. However, for batch products, the printing color of the product will inevitably be required to be consistent, otherwise it will exist. The worry of true and false, so we will see the customer is very strict about the printing color of the packaging products. For the printing company, there is a certain amount of psychological pressure on the re-printing of each product. Because it does not pay attention, it will lead to batch scrapping, and the loss is huge.
We all know that offset printing is also called lithography. It is called lithography. It is because the printing plate is a flat plate. The pattern on the plate is neither negative like gravure printing, nor like watermark and flexo. The positive image is a pattern left after the photosensitive layer is photosensitive. All the patterns except the solid are formed by the dots. The shades of the highlights and low-light areas in the pattern are formed by the density of the dots, and the density of these dots meets the design requirements. Whether the color reproduction state of the printing plate is stable or not depends on the high and low accuracy of the density reduction of the pattern dot on the printing plate. Therefore, whether the color quality of an offset printed product has a problem, 90% depends on the printing version of the printing machine. The density of the dot density reduction is high.
Offset printing version, whether it is PS version or CTP version, relies on the accuracy of dot reduction density to control the accuracy of color, because the color of offset printing is achieved by the effect of superimposing several colors. Therefore, the printed product is extremely dependent on the color accuracy of the high-light and low-light areas of each color, and the accuracy of each color depends on the yield of each corresponding printing plate, so only the control The quality of the printed version of the machine can effectively avoid the formation of printing chromatic aberration, in order to effectively reduce production costs and increase profit margins.
In a patented technology "offset printing plate dot reduction density determination method", an effective technical means is adopted, and the dot data of the film or design file is extracted by using the full coverage of the printing plate, and then the restored version of the printed plate is removed. The dot density data is extracted, and the two are comprehensively compared. The aligned data can accurately carry out the highlights on the printing plate and the film on the film, and the dots in the low-light zone are strictly compared, and the data is compared. The effect of the dot reduction by the software system is that the contrast is too large, or the contrast is low, and the range of the contrast is too large or low. If the contrast does not cause significant chromatic aberration, it can be regarded as qualified. The machine prints. If the contrast is outside the allowable range, the printing plate must be scrapped and re-made.
Comparison of the contrast between the highlight and low-light regions is the most effective technical method to determine whether the print dot reduction density is acceptable. First of all, the basis of the data comparison is the film or design document. If the density of the dot density of the printed version of the color is too large, then the pattern of the color may have a color difference, because you want to keep up with the highlight area. Color, then the color of the low-light zone will be biased, and to keep up with the color of the low-light zone, the color of the highlight zone will be shallower, and thus cause the color cast of the entire finished color. If the dot density contrast of the high and low light areas is small, then the color of the high light area is sufficient, and the color of the low light area is shallow, and if the color of the high light area is normal, the color of the low light area is biased, and at the same time It will also cause the whole color to be heavy, causing obvious color cast, and will make the whole printing effect look gray, and it will be old and lifeless.
The software system of "offset printing screen dot reduction measurement method" can not only compare the dot density of the printing plate reduction, but also analyze the deviation value of the dot density, and analyze whether the deviation is small or large, and the deviation value How much is the solution at the same time. According to the deviation value, it can be analyzed whether it is caused by inaccurate printing plate or development, whether the printing time is insufficient or the time is long, and the error is how to correct it. It is caused by a change in the hardness of the developer, or caused by fatigue of the developer, or due to insufficient development time. This series of data can be visually displayed on the interface of the computer. After seeing the unqualified alarm prompt, the operator can look at the computer to know where the problem is and how to deal with it.
The technical scheme with higher automation degree can also directly control all the equipments to automatically adjust by using the computer, such as adjusting the light intensity of the printing machine, adjusting the exposure time, and adjusting the printing time of the washing machine. Replace the developer in time and so on. All of this is done in an automated situation, without manual intervention, so the effect of checking the pass rate before the printing plate is absolutely accurate.
Under normal circumstances, we may encounter some products, the first printing color is no problem, but in the second printing, there is a problem, printing is no problem when proofing, but there is a problem in the production of large goods. These phenomena are common problems in many offset printing and printing companies. All of this is caused by the unqualified printing version. If you can't reprint the printing plate in time, you can't print it anyway. Qualified color comes because all the chromatic aberration problems caused by the dot density error cannot be adjusted on the printing machine. Therefore, this problem will bring great loss to the production efficiency of the enterprise, and will also give the product quality problems. Brings immeasurable danger.
The technical scheme of "Dyeing printing plate dot reduction density determination method" can effectively avoid the unqualified printing of the unqualified printing plate after repeated debugging, and then it is forced to re-plate after many debugging failures. In this way, the output of a day may be reduced by tens of thousands of sheets, not only the efficiency is reduced, the labor cost and the production and processing costs are all increased, and the profit rate and added value of the natural products are reduced, so that the printing version is guaranteed. The pass rate is the most powerful means of ensuring efficient production and quality.
Although the method for measuring the density of offset printing offset dots is still in the technical stage, its function after forming a product is enormous. There are nearly 60,000 large, medium and small offset packaging companies in China, and the demand for such technology can be imagined. The industry's product profits are getting lower and lower, how to deal with it, only reduce losses and increase profit margins. All losses are 100% of the profits, and the loss of every penny represents the loss of profits. Increasing production efficiency is the most effective way to increase production profit margins, because efficiency does not increase by 10%, then profit margins can be increased by 40-50%, and efficiency can be increased by 20%, then your profit margin can be doubled. But the only way to effectively solve this problem is to help companies achieve the goals you want. Therefore, enterprises that want to print plate making equipment, offset printing companies can find opportunities in a timely manner, and apply technology to production in a timely manner.