Six, bubbles Substrate will appear bubbles on the ink after printing. The main reasons for bubbles are as follows: 1 The substrate is poorly processed before printing. Substrate attached to the surface of dust and oil traces and other substances. 2 bubbles in the ink. In order to adjust the ink, adding solvents and additives to stir, the ink will be mixed with some bubbles, if placed regardless of the low viscosity of the ink will naturally deaeration, high viscosity ink and some can not be natural deaeration. Some of these bubbles are naturally eliminated in the printing process due to the transfer of ink, while others become larger and larger. In order to remove these bubbles, defoamers should be used. The amount of defoamer added in the ink is generally about 0.1 to 1%. If the amount exceeds the prescribed amount, it will have a foaming effect. After the ink is transferred, even if it is foamed, as long as the wettability of the substrate and the ink flowability are good, the bubbles on the surface of the printing ink film will be gradually eliminated, and the ink forms a flat printing ink film. If ink bubbles are not eliminated, the ink film will form a ring-shaped irregular film surface. Bubbles in general ink can be degassed by the action of the screen when passing through the screen. In addition, the use of hot water or boiling water will have a better defoaming effect when the ink is mixed and stirred. For transparent inks such as red, blue, and green, the linking material of these inks has the feature of easy foaming due to the small proportion of organic pigments in fine particles. If the corresponding thinner, tackifier or release agent is added, the ink can also be converted into a stable ink with good printability. 3 The printing speed is too fast or the printing speed is not uniform. Appropriately reduce the printing speed and maintain the uniformity of printing speed. If none of the above measures can eliminate air bubbles in prints, consider using other types of ink. Seven, net marks Screen marks sometimes appear on the surface of the ink film. The main cause of screen marks is the poor fluidity of the ink. During the screen printing process, when the printing plate is lifted, the ink transferred to the printing material fills the screen traces with its own flow, making the surface of the ink film smooth. If the ink has poor fluidity, when the screen plate is lifted, the ink flow is relatively small and the screen marks cannot be filled, and a smooth and flat ink film cannot be obtained. To prevent the appearance of screen marks on prints, the following method can be used. 1 Use a highly fluid ink for printing. 2 can consider the use of slow-drying ink printing, increase the ink flow time so that the ink gradually exhibited and cured. (3) Use silk finer wire mesh when making plates. Eight, the printing position is not accurate Even if there are no problems in the screen size, printing machine, etc., the inconsistent shape of the printing material, the excessive shrinkage of the material, and the inconsistency will cause the printing position to be inaccurate. For example, paper type printing, drying after a color printing, changes in the temperature, causing changes in its size, the results of the second and third printing, it will appear overprint failure. When the printed material is a plastic product, changes in the temperature and humidity of the printing place can cause changes in its size, affect the printing accuracy, and the shape of the plastic product and the conditions (such as temperature and time) during molding processing are not exactly the same. All must be considered, take appropriate measures, and make corrections as much as possible in advance. 9. Overprint fault Overlapping ink film is called overprinting. In the case of multi-color printing, ink printed on the previous ink cannot be clearly printed on the ink film of the previous printing. This phenomenon is easily caused by some kinds of ink, and some are not easily produced. For example, an oxidative polymerization type ink has a large amount of desiccant added to promote drying, and when the ink film is oxidized and cured excessively, the two colors of ink repel each other. In addition, if an antifoaming agent is added in excess to the volatile ink, the antifoaming agent forms a thin film on the surface of the ink strand, preventing the overprinting. The remedy is to use inks with good overprint properties to reduce the viscosity of the ink, add additives to the ink, and reduce the drying speed of the ink. X. Expanded size of finished ink strands After screen printing, the print size sometimes increases. The main reason for the increase in printing size is the relatively low viscosity of the ink and excessive fluidity; the size of the screen printing plate is also the cause of the increase in the printing size. In order to avoid the ink flowability caused by the overflow of the ink after printing to the surrounding, resulting in larger print size, consider adding a certain amount of thickener in the ink with excessive fluidity, in order to reduce the flowability of the ink, can also be used Fast-drying inks speed up the drying of ink after printing and reduce the flow of ink. When making screen printing plates, the quality of the screen printing plates must be strictly guaranteed. Eleven, ink film cracking The cracking of the ink strand is caused by the effect of the solvent and a large temperature change. Substrate material itself can also cause ink film cracking. In order to prevent the occurrence of ink film cracking, the nature of the ink and the solvent resistance of the substrate should be taken into consideration when selecting the solvent. Use solvent-resistant and oil-resistant materials as printing materials, and pay attention to maintain a balanced shop temperature. In multi-color overprinting, it should be fully dried in each color, and strictly control the drying temperature, which can effectively prevent ink film turtles Cracking occurs. Twelve, ink Ink is the phenomenon of ink overflowing outside the printed lines. When printing a line, the ink overflows on the side of the direction of the squeegee and affects the neatness of the line. This phenomenon is called squeaking. The ink can be solved by adjusting the relationship between the printing plate and the ink, the operation of the squeegee, and the relationship of the screen stretching angle. The shape of the through hole portion of the screen printing plate varies depending on the plate making method (indirect method, direct method, straight line method). The ideal through hole should be able to seal with the surface of the substrate when it is scratched. With the ideal through hole shape of the printing plate, the printed ink film is sharp, neat, and accurate in size, without ink. In order to prevent the occurrence of smoke and ink phenomenon, the film should have appropriate thickness, elasticity and smoothness. For this reason, soft nylon mesh and polyester mesh with high dimensional accuracy can be used for plate making. In order to prevent blemishes, it is best to use diagonal stretching in the plate making process.
Modern Dining Chair is one of the styles of dining chairs, and it is also a very popular style. Among those modern furniture brands that can be considered luxury goods, there are also many dining chair designs. If you have browsed Poliform, B&B Italia or In stores of well-known brands such as Minotti, you will also find some well-known modern dining chair designs. This is enough to prove that modern furniture not only includes sofas and some armchairs, the dining room is one of the living spaces, and the Dining Table and dining chairs are also very important. Important furniture.
The difference between a Modern dining chair and an ordinary dining chair lies in the difference in style. Modern style is not just the definition of the last century. It is more of what modern furniture brands and designers in Europe and the United States will unconsciously imbue when designing modern furniture. Incorporate some modern furniture elements.
Nowadays, modern dining chairs are not only popular in Europe and the United States, but also in some traditional areas. Modern furniture is also becoming popular. In today's information-rich world, a lot of product information is spread around the world through advertising and other marketing means. More and more people are beginning to notice some famous modern dining chair designs, so they are becoming more and more popular.
As a manufacturer of modern furniture, Delo Sofa has been providing the public with some modern furniture designs for decades, aiming to allow more and more people to enjoy high-quality modern furniture, which of course also includes these modern dining chairs.
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