In recent years, with the rapid development of digital printing technology and the promotion of diversified business needs in the information age, digital printing has gradually emerged in the printing industry. Large-format printers, as output devices for the application of digital printing technology, have broken through the development bottleneck of digital printing. It is mainly used in various fields of high-quality graphic output such as graphic fast printing, advertising, engineering drawings, GIS maps and so on. For example, the HPPageWideXL8000, the fastest large-format color printer in history, is shown below. Because of its unique performance advantages, HPPageWideXL8000 can be adapted to expedited and fast printing tasks, and can deliver mixed output in half the time. In order to ensure the long-term printing supplies supply and image output quality, HPPageWideXL8000 is equipped with 6 paper rolls and 2 large-capacity ink cartridges, which greatly reduces the time consumption caused by switching back and forth between media during operation, and can also ensure color Drawing output is clearer and fuller. HPPageWideXL8000 can help users save 50% of the total cost by virtue of its amazing printing speed, intelligent processing software and high-quality pigment ink. The HPPageWideXL large-format printing products have exported 100 million square meters of printed drawings for Chinese users within two years of entering the Chinese market. The HPPageWideXL8000 large-format printer has also promoted the transformation of Chinese drawing output from black and white and blueprint documents to color documents. Compared to printers with printheads mounted on a scanning rack, the performance challenges of pigment inks used in large format printers are more severe. Opening the lid for a long time has become a factor driving the innovation of the large format printing system and its ink design. Then the question is coming We need to design inks that can be opened for a long time The strict control of the physical properties of the ink within the specifications is critical to the reliability of ink droplet ejection. When the print head is unsealed, moisture evaporates from the nozzle. All inkjet printing systems that use water-based inks cover the print head when not in use to prevent excessive water loss from the nozzle. The nozzle of an inkjet printhead is very small, only about one-fifth of the diameter of a human hair, so the evaporation of water will concentrate the ink in the nozzle within a second or two. The figure below illustrates the effect of water loss from idle nozzles. Ink pigments and liquid components that are not easily developed will be concentrated, and the surface concentration of the ink in contact with air is the highest. As the density, viscosity, and surface tension of the ink change, a fluid plug will form, blocking the nozzle. Eventually, this sticky plug prevents ink droplets from being ejected and needs to be repaired. The first generation of HP pigment inks for desktop large format printers-HP 970/971 pigment inks, are designed for HPOfficejetProX series printers. Since this is a sheet-fed printer, you can spit a few drops of ink into the ink bowl under the paper path during paper change to reduce the impact of opening the cover. HP R & D engineers and chemists need to extend the cover opening time to about 10 minutes to meet the production requirements of large-format applications. They applied the knowledge they learned from the HPOfficejetProX series printers and formulated a new generation of advanced inks: HPPageWide pigment inks. The figure below illustrates how HPPageWide pigment inks resist the effects of long-term lid opening. After ejecting a drop of ink, the film-forming agent in the ink quickly moves to the meniscus, forming a vapor barrier to reduce water loss. Compared with the ink without film-forming agent, the formation speed of the stick plug is reduced by ten times. This can maintain the physical properties of the ink longer to ensure the reliability of ink droplet ejection. This film-forming agent has an important characteristic, it does not hinder ink droplet ejection. As the ink is ejected from the nozzle, the film it forms will break, and then the meniscus will extend to become the leading edge of the ink droplet. When the print head is opened for a long time, another method used by HP printing system engineers to ensure the reliability of ink droplet ejection is to eject ink onto the paper. If the nozzle is idle for more than the specified time, it will automatically eject ink onto the paper To update the ink in the nozzle. HPPageWide large-format printing technology combines low inkjet rate with the physical properties of HPPageWide advanced pigment ink to achieve a stable operation. At the same time, due to reduced ink consumption for maintenance and longer ink usage, the number of ink cartridges that need to be recycled is reduced accordingly, reducing production costs. HPPageWide pigment ink prints dry immediately after being output, and can be processed immediately without smudging when touched by hand. The built-in dryer maximizes production efficiency, and is also very useful for papers with low water absorption. HPPageWide pigment ink can quickly penetrate the paper with strong water absorption, reducing the need for drying. In OnePass printing, large-format printing inks must have a wide color gamut and high black optical density. On HP heavyweight coated paper, HPPageWide pigment ink can print 1.7KOD and 430,717 CIELAB units of color. In addition, the HPPageWide pigment ink uses pigments to achieve high durability. The special polymer binder in the ink forms a hard protective film on the paper surface, which keeps the pigments stationary and improves the ability to resist highlighter application. On low-cost plain paper, HPPageWide pigment inks can print high-color and black-saturated prints with lower levels of ink coverage, reducing production costs. These help to extend the life of the print head. HPPageWide pigment ink printing technology provides the foundation for current and future solutions, enabling high-speed, reliable, stable, and affordable printing on a variety of paper sizes and types. These solutions are scalable in design and performance, and can meet a variety of office, commercial, and industrial printing needs. Editor in charge: null 1. Dressing Table style, everyone has their own different aesthetic vision, so in terms of appearance, as long as you like it, but the appearance of the dressing table is best to be brushed with paint, so that it is easy to clean and prevent cosmetics from penetrating into Inside the dresser, affects the look of the dresser. At the same time, you can also choose the style of the dresser according to the overall style of the room; LED Dressing Table,OEM LED Dressing Table,Dressing Table With LED,LED Makeup Dressing Table Jinan Tri-Tiger Technology Development Co., Ltd , http://www.tritigercn.com
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What kind of ink can resist the long-term opening of large format printers