Ink is the most basic element of inkjet printers for producing text and graphics, and ink cartridges are containers for ink. Is it really that simple? of course not. The quality of the ink and the design of the ink cartridge are one of the most important factors in determining print quality. It is said that its effect on print quality is completely beyond the printer itself. Printer function The printer itself has only three functions: one is to precisely control the series of mechanical actions such as paper feed and print head movement; the other is responsible for receiving print data and print instructions from the host through the interface and storing them to the local cache; The own CPU operation executes a print command to process the print image data, and converts the graphic information into a print head control command that controls the ink injection. Among them, the printer only achieves the purpose of controlling image quality by adjusting the ink color and controlling the droplet size through the third function. More elements such as color reproduction, layering/detail performance and other image quality are actually implemented by *ink. The mystery of the ink cartridge As far as the ink itself is concerned, the chemical composition of the pigment is extremely complicated. The ink is divided into two typical combinations of 4 colors and 6 colors according to the different application grades of the printer. The corresponding ink cartridges are also divided into 4 colors and 6 colors. At present, most domestic and non-photo-grade inkjet printers are only equipped with 4-color ink cartridges; medium- and high-end photo-quality printers use 6-color ink mixing to achieve this because they need to display more color gradations and natural transitions. purpose. In addition, whether using the "hot spray" or "cold spray" principle, the ink is ejected from the nozzle of the print head at a high speed and attached to the paper to form an image. Therefore, the surface tension, adhesion, permeability and other indicators of the ink will affect the print quality of the image. In addition, the ink cartridge contains liquid ink, and how to ensure that the ink does not leak in the printed or non-printed state is also a very serious problem. Leakage not only causes waste of ink, but also defaces the printer and the environment, and the quality of the printed image is not guaranteed. Take EPSON's inkjet printer cartridges as an example. The various types of ink cartridges have more than 200 patented technologies, and more than 460! It can be seen that the importance of the ink cartridge is high in order to get a good image effect. Below, we take the EPSON numbered T008 ink cartridge as an example, let everyone see what some mysterious design in the ink. Due to technical difficulties and performance problems, we try to choose content that is easy to understand and meaningful for users to use/purchase. It is a 5-color color ink tank with EPSON number T008. It is suitable for EPSON STYLUS PHOTO 790 inkjet printer (this is a 2880×720dpi 6-color photo-grade home printer, the price is 1880 yuan). The picture shows a new ink cartridge that has just been removed from the vacuum-sealed package. We can see a plastic sheet on the underside of it and a long “tailâ€. This is the vacuum seal of the cartridge that must be torn off before the cartridge is mounted on the nozzle holder. Remove the seal sticker and the nameplate above it. If you look closely, you can see that there is a hole in the sidewall of the pit under the seal, and each hole is connected to a narrow groove forming a labyrinth route. The narrow groove passes through a hole that leads to the uppermost one and then wraps back to the middle hole. See the direction of the air flow in the figure. The purpose of this design is to ensure that the air pressure inside and outside the ink cartridge is slowly balanced after the printer nozzle ejects the ink to prevent ink leakage. The ink outlets of the new ink cartridge are sealed with plastic paper to prevent the ink from drying out at the outlet. When the cartridge is mounted on the printhead, the plastic sheet does not need to be removed, and the ink tube on the printhead will puncture the film to allow ink to flow into the ink reservoir on the printhead. Remove the cartridge after it. First of all, we can see that the inside of the ink cartridge is divided into five storage tanks of the same size according to the color. Each storage tank has a sponge. It can be seen from the break marks at the disassembled top cover and the ink cartridge interface that each of the ink reservoirs in the ink cartridge is completely isolated. The venting holes connecting the labyrinth are in direct communication with the ink reservoir. Therefore, the nameplate on the surface of the ink cartridge must not be uncovered under normal conditions, otherwise the ink will flow out once the ink cartridge is inverted. Even if it is not inverted, the atmospheric pressure will cause the ink to leak out from the nozzle because the ink cartridge is directly open above.
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At a glance, you can uncover the big secrets in the printer's ink cartridges.