How to use relief technology to print Durable Sticker Paper medical labels

How to use relief technology to print Durable Sticker Paper medical labels

Medical label is an indispensable product identification of drugs, it can be said that it is also the ID card of medical products, is an important production process in the packaging and printing process. The main contents of the medical label should usually include: product name, adaptation symptoms, production date, production batch number, specifications, quantity, precautions, shelf life, dosage, storage environment requirements and the name of the manufacturer. Product labels are printed with monochrome, and overprint or overprint with multi-color; Some are printed with offset paper, and some are printed with coated paper and other self-adhesive paper. From the perspective of health and safety, the printing quality control of medical labels is a very important technical link. Therefore, the instructions in the product layout must be clear and clear, and the color of the printing must be accurate and consistent. Visible, medical labels should be easy to identify and anti-counterfeiting effect of good use requirements. A considerable part of medical labels are printed by traditional relief printing process. The author has also printed medical label products in clinical production practice in the past, and has personal experience in the relief printing technology of medical product labels. This paper discusses the experience of process technology control in relief printing process practice.

Reasonable design of printing color of medical label layout

Medical labels generally use neutral series of colors, among which the cooler tone of the printing page, can give patients a sense of calm and calm. And the design of light red, gold red, gold printing layout, can make the patient to restore vitality, Yang, health and vitality of the psychological feeling. Blue and silver layout design, can give patients a sense of security. The color design of printing page can also be matched according to the difference of drug use characteristics. For tonic and nutritional drugs, gold, bronze, brown or red will be the main color in the printing layout, with other colors as appropriate. Analgesia, sedation, sleep, antihypertensive and cardiovascular disease drugs, should be mainly green, blue and other colors. Deworming drug packaging, mainly white appropriate with other light color. Anti-inflammatory cold medicine such as cough and phlegm elimination, cooling and detoxification powder and other labels are mainly printed in green. The reasonable design of printing color of medical label can make patients feel safe in psychology and obtain better curative effect.

Using the principle of the change of the three primary colors for accurate ink allocation

The pure color of medical label printing is the basic requirement of product quality. Therefore, how to carry out accurate ink allocation, is a very important technical link. According to the principle of the change of the three primary colors, in addition to gold, silver color (substrate is the material of the spray aluminum paper), any kind of color can be mixed with different proportions of the three primary colors. Such as three primary color ink after equal mixing can become approximately black. A variety of different shades of light gray ink can be obtained by mixing the three primary inks equally and adding different proportions of white ink. If the primary color ink according to various proportions of mixing, can be deployed into a variety of different colors of the intermediate color or compound color, but its hue tends to a large proportion of the primary color hue. If two kinds of original color ink equal amount after mixing, can be adjusted to become the standard intercolor; Two kinds of primary color ink according to different proportions of mixing, can be matched into a variety of different hues of the intermediate color, but its hue tends to the proportion of large primary color hue. In addition, any color of ink, the addition of white ink will appear brighter. On the contrary, add black ink, its hue becomes dark. Whether the method of mixing ink color is proper directly affects the color quality of printing. Therefore, when deploying ink, we should analyze the excellent phase according to the original manuscript and determine which kinds of ink should be used to deploy. For example, to adjust lake blue ink, it can be preliminatively determined by visual observation and practical experience that white ink is the main color, peacock blue is the auxiliary color should be slightly added, if it is darker, it can be slightly added to the royal blue. As long as the main color is determined, the other colors are auxiliary colors, which should be gradually added and stirred evenly. Then, using two pieces of paper (the same as the printing paper) one of the paper surface is coated with a bit of the adjusted ink, with another piece of paper it is roughly the same as the printing ink layer thickness, and then compared with the original manuscript to see whether it is suitable. When comparing the sample, it is necessary to compare the relatively thin and light part of the paper scraping ink layer to see more accurately. Adjust ink to master a principle, that is, as little as possible with different colors of ink, that is to say, can be adjusted with two kinds of ink, do not use three kinds of ink to adjust, so as not to reduce the gloss of ink. On the other hand, the color of the scraping sample is slightly darker than the primary color, so that the printed color sample can be accurate or close to some. After the ink tone of the sample is correct, the batch ink can be adjusted according to their respective ink proportion.

Some technological measures to improve the printing quality of label products

1. Pay attention to the technical control of paper cutting process. How the paper specification precision, directly affects the product overprinting accuracy. Because of different machine structures, their front gauge and pull gauge position is not the same, so if the edge of the paper is not cut square enough, there is a hypotenuse or wave edge, it will cause the phenomenon of overprinting is not allowed. This requires rubber convex combined products, the side of the paper must be cut into a right Angle, straight line, there is no hypotenuse or wave side phenomenon. In order to improve the cutting accuracy of paper, it is necessary to strictly control the thickness of cutting, because the thicker the paper is, the softer the paper is, the more severe the deformation of the paper surface when the paper press down. Therefore, the less the thickness of each stack, the more beneficial to improve the precision of paper cutting. In addition, the blade mouth should be kept sharp, and according to the hardness of the paper, choose the right blade Angle, which is also an important measure to improve the precision of cutting.

2, pay attention to the reasonable selection of printing plate base. The characteristics of the backing material of the plate have a great influence on the printing pressure, overprint accuracy and ink quality. Traditional wooden base, the material is not solid, square, flatness and stability are relatively poor, prone to bow and deformation, printing quality is difficult to ensure. Therefore, relief printing should use solid, flat, square, stable aluminum or cast iron and other gold property material base, which is a reliable guarantee to improve the accuracy of printing overprint and ink quality.

3. Pay attention to the rational use of paper. Paper is very sensitive to the change of temperature and humidity of the external environment, especially the paper just produced, the most likely to appear because of the change of temperature and humidity, resulting in inaccurate overprinting of products. In order to reduce the chance of this adverse situation, the newly produced paper should be stored for about half a year after being transported back by the printing plant, so that the characteristics of the paper are relatively stable before being put into use, so that it is not easy to appear overprinting problems. In addition, the paper can also be hung, and the cut paper placed in the printing workshop for several days, and the temperature and humidity of the printing workshop balance for a period of time, then printing is also conducive to the alignment of the product. 4, pay attention to the selection of appropriate printing materials. The relief printing process uses copper plate, zinc plate, resin plate and other plates. Due to the different characteristics of the printing plate material, there are obvious differences in their printing suitability and printing quality. According to the ink-philicity, ink transmission, gloss and pressure effect, among them, resin plate performs the best, copper plate follows, zinc plate performs the worst. If the printing quality of the dot, the copper plate of the dot printing quality is better, the expansion rate of the dot is the least. Therefore, according to the characteristics of the product, reasonable selection of plate materials for printing, in order to better improve the printing quality of the product.

5. Pay attention to the reasonable arrangement of printing color sequence. Reasonable arrangement of printing color sequence is an important measure to improve printing quality. Reasonable arrangement of printing color sequence should mainly be considered from these aspects, namely: according to the characteristics of the substrate to consider the arrangement of printing color sequence; According to the difference in the structure of the printing machine to consider the arrangement of color sequence; Arrange the color sequence according to the different structure of the printing layout; According to the original color characteristics to consider the arrangement of color sequence; According to the difference of ink characteristics to consider the arrangement of color sequence; Arrange color sequence according to ink drying characteristics. This scientific and reasonable arrangement of printing color sequence can improve the production efficiency and printing quality of products.

6. Pay attention to the wrapping and lining technology. Lining is the medium to realize the transfer of pressure and imprinting, and its characteristics also affect the alignment and ink quality of the product. Therefore, the deformation coefficient of the lining material should be small, and the material should be neutral and hard. At the same time, must be in strict accordance with the equipment specifications of the technical parameters, set the thickness of the lining. In addition, the lining must be tightly packed, there is no virtual loose, bulging state, in the lining should not repeatedly patch or hollow, in order to prevent the occurrence of inaccurate overprint and double shadow phenomenon.

7, pay attention to adjust the appropriate printing pressure. The printing pressure should be adjusted evenly and moderately. Too much pressure is easy to make the printing sheet stretch and deform, resulting in the disadvantage of overprinting. Therefore, the appropriate printing pressure should be adjusted, and the printing pressure should not be heavy, so as not to make the edge of the printing page rough and expanded.

8. Pay attention to the overprint production cycle of the product. After the printing of the first color or several colors, those who can overprint should be overprinted immediately, so as to avoid the expansion and variation of the printing due to the delay of too long, resulting in the generation of inaccurate overprinting quality fault.

9, pay attention to prevent the printing of sticky dirty phenomenon. When printing medical label products with relief process, it is easy to cause dirt on the back of products when the paper gloss is good, the paper is acidic and affects the drying of ink layer, the printing ink supply is large, the ink drying speed is slow, and the semi-finished products are stacked too high. The solution is to use the "deep ink thin printing" process for printing, that is, the ink color is darker, so that the printing ink layer is thinner, so that it can not only meet the printing ink color requirements, but also reduce the chance of sticking dirty. In addition, the ink can be properly added to dry oil, so that the ink layer timely dry; Add anti-stick agent in the ink, so that the ink layer on the surface of the printing is not easy to transfer phenomenon; Powder the surface of the ink layer to prevent the transfer of the surface ink layer to the back of the printing; The quantity of printing semi-finished products is reduced appropriately, and the semi-finished products are hung in small stacks by an air rack.

10, pay attention to prevent the printing page paste edition phenomenon. When the printing pressure is uneven or too heavy, the ink particles are too thick, the fluidity of the ink is poor, the paper surface appears powder, hair drawing, the adjustment of the high and low position of the inking roller is not comfortable, and there is bad contact between the inking roller and the series of inking roller, it is easy to cause the paste phenomenon. In this case, corresponding measures should be taken to adjust.

11, pay attention to prevent the printing page ink crystallization phenomenon. When the drying oil in the ink is added too much, the ink layer on the surface of the printing is too dry to form a glass surface, so that the overprint ink color is difficult to adhere to the base color of the printing, even if it can be printed up, the ink color is only showing obvious flower phenomenon, which is the ink film crystallization phenomenon. To prevent the crystallization of printing ink film, it is necessary to strictly control the amount of dry oil and shorten the overprint production cycle as far as possible. For the semi-finished products that have been crystallized, you can add soap crumbs in the ink of overprinting color. Its practice is: the first soap crumbs with resin oil into a slurry, and then add the ink is easier to stir evenly. Add soap crumbs to the ink after deployment, should also add dry oil, otherwise, overprint ink layer will appear slow drying phenomenon.

12, pay attention to prevent the printing page ink color phenomenon. When the printing pressure is uneven or too light; The lining surface loses good flatness under compression deformation; The paper surface appears to drop powder, hair and adhere to the layout or ink roller; The colloid of the inking roller is skewed, resulting in uneven inking. Printing page ink crystallization phenomenon and ink in the presence of too much anti-stick agent or did not stir evenly, it is easy to make printing ink color, should take corresponding measures to deal with.

13. Pay attention to the protection of semi-finished printing products. If the climate is changeable, the semi-finished products after printing should be sealed with plastic film, so as to avoid the phenomenon of expansion and mutation, and ensure the quality of the products.

To sum up, improving the quality of pharmaceutical product label printing is the basic requirement of product usage characteristics. Medical product labels with good printing quality can give people a sense of credibility and security when used. Therefore, a correct understanding of the medical product label printing process control technology and the use of advanced technology in the printing process can not only effectively prevent a variety of printing defects, but also improve the production efficiency and the printing quality of products.