It is difficult to imagine modern life without a printer. Scripts are printed at schools, essays are printed at the university, contracts are at work, and even at home it is extremely necessary for us to transfer this or that information to paper. There are several types of printers, they are classified by type of print, by format, by size and even by type of printed materials. Consider the principle of printing an inkjet and laser printer.
How an inkjet printer works
We will try to highlight the principle of printing an inkjet printer briefly. The print quality is slightly worse than that of the laser. However, their cost is significantly lower than that of laser ones. The inkjet printer is ideal for home use. It is easy to operate and easy to maintain. The principle of printing inkjet and laser printers are markedly different. This is manifested both in ink supply technology and in equipment design. So let's talk first about how an inkjet printer prints.Its principle of operation is as follows: an image is formed in a special matrix, and then this matrix imprints the image on the canvas using liquid dyes. Another type of inkjet printer is equipped with cartridges that are installed in a special unit. In this case, using the print head, ink is fed into the print matrix, and it transfers the image onto paper.
Methods for storing ink and applying it to paper
There are three ways to apply ink to the canvas:• piezoelectric method;
• gas bubble method;
• drop-on-demand method.
The first method when printing leaves an ink dot on the canvas, due to the piezoelectric element. With its help, the tube is compressed and expanded, preventing excess ink from entering the paper.
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Let's talk about inkjet printers
Inkjet printers have gained particular popularity due to the possibility of color printing. When printing, the image is formed by superimposing the basic tones of each other with different saturations. A set of primary colors is abbreviated CMYK. It includes: yellow, purple, cyan and black.Initially, a tri-color set was proposed, which included all of the above tones, except for the black shade. But when applying yellow, cyan and magenta, at 100% saturation, it was not possible to achieve black. The result is a brown or gray color. Therefore, it was decided to add black ink.
Features of the inkjet printer
The main indicators of the quality of the printer include noise, print speed, print quality and its durability.Printer Operational Properties:
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- Cartridges are easy to refill on their own, just purchase ink and read the instructions.
- Possibility of connecting a continuous ink supply system. With large print volumes, this will significantly reduce costs.
- High quality photo printing.
- A wide selection of print media.
A bit about the laser printer
A laser printer is a type of equipment designed to print text or images on paper. The history of this type of equipment is very unusual. And it has a marketing approach, unlike an inkjet printer, which created hundreds of scientific concepts.1969 Xerox . , . 1978 , . , . , Canon, 1979 . , .
The prints obtained in this way have high performance characteristics. Moisture is not terrible for them, they are not afraid of erasure and fading. Images obtained in this way are very high quality and durable.The principle of printing a laser printer in brief:
- The laser printer applies the image to the canvas in several stages. Toner (special powder) melts under the influence of temperature and adheres to paper.
- The squeegee (special scraper) removes unused toner from the drum into the waste storage tank.
- The caronator polarizes the surface of the drum, and by means of electrostatic forces assigns it a positive or negative charge.
- The image is formed on the surface of the drum using a rotating mirror, which directs it to the right place.
- The drum moves along the surface of the magnetic shaft. There is toner on the shaft, which sticks to the places of the drum where there is no charge.
- After the drum rolls on paper, leaving the toner on the canvas.
- At the final stage, paper with toner sprayed on it is rolled through the oven, where the substance melts under the influence of high temperatures and adheres securely to the paper.
The principle of printing a laser printer has much in common with the technology used in copiers.
Color laser printers and their main differences
The printing process on a color printer differs from black and white in the presence of several shades that, when mixed in a certain proportion, are able to recreate all the colors we know. Color laser printers use four separate compartments for each ink color. This is their main difference.: , , . . , - . , .
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The main disadvantages of laser printers:- During equipment operation, ozone is released. So, you need to work with him in a well-ventilated area.
- High power consumption.
- Bulky.
- High cost of equipment
Based on all the pros and cons, we can conclude that inkjet printers are great for home use. They have an affordable price and small dimensions, which is important for many users.
The laser printer is suitable for offices and other institutions where there are many black-and-white printouts and speed of processing of documents is important.