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What is the printing in the sofa fabric

                       
Update:19-08-2020
Summary:

The printing fabric four main methods of textile printi […]

The printing fabric four main methods of textile printing are block printing, roller printing, screen printing and thermal transfer printing. In each of these methods, the color is usually applied in the form of a thickened paste, then the color is usually fixed by steaming or heating, and then the excess color is removed by washing. Printing styles are divided into direct printing, row printing or resist paper printing. In direct printing, the colored paste is printed directly on the cloth. For discharge printing, the cloth is dyed with a background color first, and then the reagent or reducing agent in the printing paste is destroyed. This operation may cause the discharged pattern to remain white on the colored background, although the printing paste may also contain color materials that are not damaged by the discharge agent, thereby forming a colored pattern. In the process of resist processing inside, a substance called resist is first printed on the cloth to protect these printed areas from the effects of color. When clothes are dyed or filled with paint, only those parts that are not printed with resist are dyed. The special application of this technology is to give the fabric a soft effect, that is, to print a layer of resist on the fabric and then treat it with caustic soda.

 

flower printing on fabric velvet

 

The wood block with embossed design is made of solid wood, or a material that bonds fine-grained wood with cheap wood. When the design includes a large area, these are recessed and filled with a hard space fleece feel. Thin wires are usually made of copper tape, while other effects are made by interlacing copper tape and felt. In order to facilitate the registration of continuous printing or offset printing, each block has several spacing pins, which coincide with well-defined points in the pattern. The cloth is printed on the table, which is covered with fabrics or blankets of several thicknesses, and the whole table is covered with thick tightly stretched synthetic fiber rubber. Spread the cloth to be printed on the rubber, spread it in place or nail it to the back cloth fixed on the table. Apply the color evenly to the block, and use the handle of a small heavy hammer or mallet to imprint the pattern on the fabric to be printed to help the paste penetrate. Then, apply more colors to the block and repeat the process using a pitch change pin to obtain a true registration. After the fabric is completely printed in one color, apply other colors in the same way until the design is completed. Although block printing has become too laborious and expensive for commercial use, some of the most beautiful prints have been made this way.

 

As long as you want to print long-distance fabrics with the same design, use this technology. Based on a modern machine originally designed in 1783, it consists of a large central cast-iron drum, on which a thick annular rubber cloth is passed to provide elastic support for the fabric. Interlining cloth called back ash is placed between the blanket and the fabric to prevent the blanket from being over-dyed. Although it used to be made of cotton fabric, most modern back grays are continuous nylon belts. The blanket and bottom ash are properly tensioned so that the fabric passes through the machine with the rotation of the central drum. Engraved printing rollers one for each color are pressed against the fabric and the central cylinder. The pattern on the roller is etched on the surface of the copper shell supported on the mandrel. High-quality engraving is essential for good printing. Each printing roller is equipped with a rotating color roller, which is partially immersed in a tank of printing paste. Finely ground blades doctor blades remove excess colorant from the unengraved areas of these rollers, and each blade has a fluff blade.

 

The printed fabric passes through the drying oven from the main drum to fix the color. Although this machine only prints one side of the fabric, the double-sided roller machine is essentially a combination of two rollers and can print on both sides. Modern printing presses are precision machines that run smoothly, equipped with carefully designed roller bearings and hydraulic or pneumatic mechanisms to ensure uniform pressure and flexibility. The pressure is adjusted through the dashboard, and each roller is independently controlled. Automatic registration is achieved through electromagnetic button control, and modern electric motors provide a smooth running variable speed drive. The cleaning of the gray back and the printer blanket has also been automated. The pressure is adjusted through the dashboard, and each roller is independently controlled. Automatic registration is achieved through electromagnetic button control, and modern electric motors provide a smooth running variable speed drive. The cleaning of the gray back and the printer blanket has also been automated. The pressure is adjusted through the dashboard, and each roller is independently controlled. Automatic registration is achieved through electromagnetic button control, and modern electric motors provide a smooth running variable speed drive. The cleaning of the gray back and the printer blanket has also been automated.

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