Advantages and disadvantages of color laser printers. A jet machine is more suitable for you if you... Disadvantages of laser models

It is difficult to imagine a modern office that would not be equipped with a printer. Letters, contracts, price lists and other working documentation - all this, as a rule, goes beyond handwritten form and has long been printed on paper. But what if, in addition to printing, you also need to copy, fax or scan? In order to solve all these issues, you will need 3 devices or just purchase a laser MFP once, which combines the functions of a scanner, copier, printer, and in some models, also a fax.

Like printers, multifunctional devices, according to printing technology, they are divided into laser and inkjet. For a long time the price of laser printers was obscenely high, which was their main drawback. At present, in terms of “ease of use - price - operating costs”, laser printers have rapidly replaced inkjet printing.

And what can I say - the advantages laser technology mass of prints. Thanks to original cartridges having great resource, laser printers have lower printing costs. In addition, cartridges can be repeatedly replaced or refilled with new toner. The resulting prints have good resistance to sun rays and moisture.

Thanks to the beam's ability to finely focus, the resolution and quality of prints is high. And the printing speed is faster than that of inkjet devices, and it does not depend on whether it is a color or black and white printer. In practice, color and black and white laser MFP They work the same way, the only difference is that the first ones use 4 types of color toner for printing.

The advantages of MFPs undoubtedly include the following points:

• The space occupied by the MFP will be much smaller.
• The final cost of a multifunctional device will be less than that of the devices performing its functions separately.
• Use of consumables of the same type.
• Ease of use and maintenance.

If you plan to use multiple devices, laser MFP will be an excellent option for solving all printing issues. However, MFPs also vary greatly in their technical characteristics.

You can choose a device designed to print 1000 pages per month, or you can use one MFP to satisfy the needs of an entire organization or office, with a monthly volume of 100,000-300,000 thousand prints.

There are users who don’t even realize that there are devices with such print volumes, or who don’t quite believe in their “abilities”, but prefer to buy a lot individual devices. But this turns out to be much more expensive and, moreover, uneconomical in the process of arranging all the equipment at the workplace.

Dot matrix printers are gradually falling out of use because they are very slow and noisy and produce copies Low quality. However, the cost of printing one copy on a dot matrix printer is low, and dot matrix printers allow you to make up to three copies simultaneously.

Therefore, at present, dot matrix printers are most often used in conditions unfavorable for other printers, for example, in production, in those workplaces where a large amount of text information needs to be constantly printed. Prices for dot matrix printers are quite stable - they are not currently decreasing and, according to experts, are unlikely to decrease in the future.

4.2. Advantages and disadvantages of inkjet printers

The main advantages of inkjet printers are:

Quite low cost;

Possibility of printing color images and high-quality photo printing;

High printing speed;

Relatively quiet operation;

Low power consumption.

Also, some models of inkjet printers allow you to print not only on paper, but also on films, CDs, and fabrics.

The disadvantages of inkjet printers include:

Expensive Supplies(cartridges and special paper);

Vulnerability of copies printed on non-branded paper to light and water;

The high cost of one copy is about 25-30 kopecks, excluding the cost of paper.

4.3. Advantages and disadvantages of laser printers

Main advantages laser printers:

High speed;

Large volumes of printing;

Low noise level during operation;

Resistance of printed copies to the influence of water and light;

Low cost per copy - about five kopecks per sheet.

The disadvantages of laser printers are:

High price;

Minor radiation.

Conclusion

The need for using printers these days is so enormous that even in the smallest office space it is available. Offices, reception rooms, offices and departments, as well as living rooms are filled with these very useful and necessary for office work and learning devices.

Now everyone can choose the most suitable printer, taking into account the huge variety of products that the market provides. The most popular is probably jet printer due to its versatility and low cost. With such a printer you can print both texts and a variety of drawings, graphics, and even photographs.

In second place in terms of popularity and prevalence is the laser printer. Most offices use monochrome laser printers, which have high printing speed and excellent quality, while being quite affordable. Regarding color laser printers, we can say that they are quite expensive, and not everyone can afford to have such a device.

Dot matrix printers are distinguished from other models by both the lowest price and the most low speed print. Also, dot matrix printers are monochrome, which is not in their favor. However, these printers are the very first, they were invented in 1964 and are quite worthy of respect.

Sublimation printers are a very specific group of printers, so they are not as common as others. The use of these printers largely extends to printing photographs and images, therefore, they have a fairly high cost.

You can also name the most popular companies that produce printers of various models: Epson, Xerox, Canon, Hewlett Packard and others. Printer cartridges, as a mandatory accompanying element, are also produced by the above-mentioned companies.

The printer uses so-called dot printing to print an image on paper. Accordingly, the more dots, the higher the image quality. A parameter such as “dots per inch” (DPI) or “line per inch” (LPI) is the main one for the print quality of the printer, that is, it shows the maximum number of dots per 1 inch that the printer can print.

Toner consumption when printing text reaches, on average, about 5% of the page. When printing graphic images this coefficient is higher - approximately 15%. The resource of monochrome cartridges for inkjet printers is 300-800 pages, the resource of color cartridges is significantly lower.

HP laser printer cartridges have an increased print resource, monochrome - up to 4500 pages, color - up to 2500 pages, while these cartridges are the most expensive.

Today, to increase printing speed, many manufacturers equip printers with built-in memory. Quite universal models today are multifunctional devices that combine a scanner, printer and copier at the same time. Such devices are not cheap, however, purchasing all these devices separately will cost much more.

Pronin Yura

Printers

Teacher: I. Isaeva

Computer science

Tallinn 2009

INTRODUCTION.. 3

Inkjet printers.. 4

The main advantages of inkjet printers are: 5

The disadvantages of inkjet printers include: 5

Laser printer. 6

Main advantages of laser printers: 8

The disadvantages of laser printers are: 8

Matrix printer. 9

Main advantages dot matrix printers: 9

The disadvantages of dot matrix printers are: 9

Conclusion. 10

Literature used: 11

Application: 12

INTRODUCTION

Printer (English: printer) - a device for printing information onto paper. Refers to mini computer devices. The output of the print is called printout, and the resulting output is called printout. Printers - pretty great view devices. In order to talk about this class of devices, they need to be divided. Printers can be divided according to different criteria, for example, by the speed of outputting information onto paper. It is best to divide printers according to the principle of information output, i.e. according to the type of their device. And also can be divided into their advantages and disadvantages.

Printers can be divided by information output, that is, by the type of their devices

1) matrix (needle)

2) jet

3) laser

Inkjet printers operate on the “syringe” principle, and the consumable material for them is ink. To form an image, the printer's print head moves along a sheet of paper and sprays small drops of ink of different colors. Inkjet printers are primarily used for light-volume household color printing - they are best suited for printing color photographs or illustrated documents. However, for large volumes of printing with significant ink consumption, they become unprofitable to use. Inkjet printers can print images of very high quality on special paper. These printers are for professional work with color images are called photo printers. Some of them can print images directly from digital camera, and some models have a color LCD screen that allows you to preview the image before printing.

Inkjet Printer Selection Options

The most expensive are inkjet printers, equipped with a variety of bells and whistles - a flash card reader, a screen for preview photographs from a digital camera, with additional seventh and eighth colors. Additional colors(mostly gray and photo black) are useful for artistic printing black and white photographs. Therefore, such printers will be useful for both professional and amateur photographers. When purchasing an inkjet printer special attention It is worth paying attention to the cartridge (a container with a dye) and its indicators, because the quality and cost of printing will depend on them. Read more There is an opinion that manufacturers often deliberately increase ink consumption for younger models in order to compensate for the low cost of the printers themselves with the high cost of consumables for them. Therefore, when choosing a printer, you need to take this into account. Inkjet printer price in to a large extent depends on:

Maximum resolution, which ranges from 600x1200 to 4800x1200 dpi.

However, the resolution value does not always directly reflect print quality. For example, the print quality of new and old models from the same manufacturer with the same resolution may differ significantly.

Similarly, you should not compare printer resolutions various manufacturers – good models manufactured by Canon provide high quality printing at a resolution of 1200x2400. Printing speeds, which range from seven pages per minute and higher for monochrome (black and white) printing. Printer resource - the maximum number of sheets that the printer can print over a month, on average - two thousand pages.

The main advantages of inkjet printers are:

a) fairly low cost;

b) the ability to print color images and high-quality photo printing;

c) high speed printing;

d) relatively quiet operation;

e) low power consumption.

Also, some models of inkjet printers allow you to print not only on paper, but also on films, CDs, and fabrics.

The disadvantages of inkjet printers include:

a) high cost of consumables (cartridges and special paper);

b) the vulnerability of copies printed on non-branded paper to light and water;

c) the high cost of one copy - about 25-30 kopecks, excluding the cost of paper.

Laser printer

How laser printers work similar to how photocopiers work. First, a magnetized area is created on the paper, to which the printing powder (toner) is attracted. Then the sheet of paper goes into the “oven” where the powder melts. Subsequently, the powder cools and hardens, resulting in a finished image appearing on the sheet.

Laser printers primary price level They allow you to receive only black and white copies, but of high quality and very quickly.

IN Lately laser printers are becoming increasingly popular, for which there are very good reasons:

1. Decreased sharply prices for laser printers.

2. Cheaper and higher quality color laser printing – with significant quantities of prints, laser printers quickly justify the money spent on their purchase.

3. Extremely high quality prints, especially text and business graphics, printed with laser printers.

4. Laser printers, compared to their counterparts of other types, are easier to maintain, more reliable and economical. For example, one refilling laser printer cartridge allows you to print from 2.5 to 10 thousand copies, and the average monthly resource of using its drum, depending on the model, ranges from 10 to 60 thousand prints.

5. Laser printers They print quickly and quietly, which is very important for office work.

6. minor radiation.

Memory capacity, digital processor frequency, resolution

Due to its operating principle, a laser printer completely forms the image to be printed on a selenium drum. Therefore, this image must also be completely in the printer buffer. Due to this important parameters The choice of a laser printer is the amount of memory installed on it and the frequency of its digital processor. For large volumes of printing documents and images, a large amount of built-in memory is required, but if the need for printing is not very significant, a printer with less memory is suitable. Overall for black and white printer the optimal amount of memory is 4-8 MB, for color - 32-64 MB and above. It is worth knowing that many modern printers It is possible to increase the amount of memory by installing additional modules. The frequency of the built-in processor of modern laser printers, depending on their model, ranges from 25 to 150 MHz, resolution - from 600 to 1200 dpi. High resolution necessary primarily for color printing; for printing business graphics, 600 dpi is sufficient.

Printer life

Shows the number of sheets that it can print during the month without being overloaded. Most laser printers allow you to make about 8-12 thousand copies per month.

Cartridge life

Shows how many copies the printer can make without needing to replace or refill the toner (dye) cartridge.

Cartridges for laser printers cost about $40-50. However, the cost of the jar of coloring powder itself is quite low, and the resource of the cartridge, on the contrary, is large - about 2.5 thousand copies. That is why the cost of copies printed on a laser printer is insignificant and amounts to about five kopecks per sheet, taking into account the cost of paper.

Print speed

Most laser printers have print speeds of 11-12 copies per minute or higher.

Andrey Bogdanov http://school. *****/computer/printer_la. php

http://www. *****/rInform/93.htm

http://www. *****/rInform/94.htm

http://www. *****/rInform/95.htm

Application:

Working principle of a laser printer

Working principle of a dot matrix printer

Working Principle of Inkjet Printer

Clear printouts, durable toners and high speed – laser printers give us all this. Laser printers are also interesting for private users. Even in the beginner class there are devices that print color images. Anyone who wants to purchase such a device should pay attention to several points.

“A laser printer is actually less economical than an inkjet printer,” says hardware expert Ines Walk-Khomyakov of PC Welt magazine. “The myth that laser printers are cheap is wrong.”

In contrast, the cost per page for color laser printers can be as much as 12 cents. It consists of the price of toner, energy consumption and paper consumption. “So you have to count accurately,” Walker-Khomiakov says. However, some entry-level printers perform very well.

Laser printers are noisier than inkjet printers
Before purchasing, Walke-Khomyakov recommends thinking about why you are purchasing it: for the office or home. “Laser printers are noisier than inkjet printers,” says the expert. This is due to the technology used, and led printers and devices with so-called built-in printing produce less noise than drum printers. With all this, they are also not quiet in operation.

An inkjet printer is better for printing photos than a laser printer
Inkjet printers have the advantage again: they produce brilliant photos. Color laser printers, on the other hand, don't stand a chance in the quality comparison. “The colors are not as bright, the image remains pale,” Walke-Khomyakov said. This again depends on the technology: while inkjet printers can mix many different colors, laser printers have limited colors. “There is also special paper for printing photographs.” On such paper on inkjet printers various colors penetrate with different intensities, thereby improving the shine of the photograph. For exposure or PowerPoint presentations, the quality of the color laser model will be sufficient.

However, color laser printers also have advantages over inkjet printers. The toner does not dry out, it can simply be stored and used again after many years in unchanged quality - “this also justifies more high price for toner,” says Walke-Khomyakov.

Various printer control languages
A further criterion when purchasing is the printing language used. “Anyone who would like good equipment needs a PCL or Postscript device,” the expert advises.

Won in the “PC world” test (edition 10/2010) Xerox Phaser 6140 V/N (price approximately 270 euros) thanks to good equipment. The price for one page of color image is 13 cents. Product winner: OKI C110. He was dubbed "small but loud." In addition, the device, priced at 180 euros, also has disadvantages: Windows users 7 should download and install only English-language drivers.

Basically the price trend is down. " Good devices can be purchased from 220 euros,” says Walke-Khomyakov. Add to this the cost of toner and electricity. “Customers should consider the fact that a color laser printer clearly consumes more electricity than an inkjet printer."

There are 2 methods by which color laser printers work. The so-called multi-pass and single-pass procedure. The latter is also referred to as the Inline technique. In this case, all colors are transferred from the printer in one step.
In multi-pass technology, printing occurs one at a time. It is at the drum transmission that part of the image is processed first. The paper then goes into print. Often these devices have a rotating drum. This makes the device compact but noisy.

Inline printers are louder because the toner cartridge is built differently. Ideally, you can achieve the same speed when printing both color and black and white images.

The choice of printer depends on the tasks for which it will be used. Each type has its own advantages and disadvantages, as well as the field of activity in which its use will be optimal. To save on your purchase of this device, it is not enough to focus on its price. You should also pay attention to the cost of consumables. For example, inkjet models are cheaper than laser ones, but with long-term use, a laser printer pays for itself due to cheap cartridge refills.

Comparison table of printers with different printing technologies

To compare printers different types use the following table. Ratings are given on a 5-point system, where 0 is the worst value of the parameter, 5 is the best.

How does a laser printer work?

Devices that use powder toner applied to a special light-sensitive drum using static electricity. As the paper is pulled, the toner from the drum sticks to the surface of the paper. The sheet is then heated to high temperature(about 200 degrees), and the powder paint melts into its surface. Printed documents are resistant to fading; the dye is not destroyed by high humidity. Unlike inkjet models, in which the ink is enough to print several hundred sheets, the resource of a laser printer is several thousand pages per refill.

The advantages of a laser printer are:

• High printing speed;
• Capacious cartridge;
• Low cost of consumables.

The disadvantages include the following factors:

• High cost of equipment;
• Emission of harmful ozone during operation;
• Poor color mixing in color printing.

How does an LED printer work?

A type of printer designed to eliminate shortcomings laser devices. In terms of their characteristics, such devices are similar to laser ones, but instead of a laser, a set of LEDs is used. The number of such light sources can reach 10,000, all of them are located in one row. Each diode illuminates a specific point of the photosensitive drum, changing its charge. Therefore, the more LEDs in the device, the higher its resolution.

When passing near the toner tank, ink particles adhere to the charged drum. After this, they are transferred to paper and further fixed using heat. Since in LED models a laser with a bulky system of reflectors is not used; they are smaller than similar laser models. The comparative compactness is especially noticeable on color devices and less noticeable on black and white ones.

How thermal printers work

The main areas of application of such devices are: outlets, payment acceptance points and other organizations issuing checks. Built-in models of thermal printers are installed in ATMs and self-service terminals. This type of printer is the most compact of all. Simplicity of design ensures the reliability of the devices.

It is important to know! Thermal printers do not require any ink for printing, since coloring is done by heating heat-sensitive paper.

The main component of a thermal printer is the print head, on which the a heating element. The receipt tape used for printing with this type of printer darkens when heated. Thus, an image is formed on it. The disadvantages of thermal printers include the low durability of finished prints. Even with careful storage, printed receipts lose color until the image completely disappears within several years.

Very important! The ribbon used for printing contains a harmful substance that is absorbed into the blood through the skin. Constantly working with receipts for a long time can lead to negative health consequences.

To eliminate these shortcomings, sublimation thermal printers and devices operating on the principle of melting paint were created. Unlike conventional thermal printers, they print on standard paper. In this case, it becomes necessary to use a consumable material - a special printing tape. Checks made by this method are more resistant to light and high humidity. Therefore, they can be stored much longer than receipts printed on thermal paper.

The temperature of the heating head can change, affecting the intensity of interaction with the pigment ribbon. Thanks to this, it becomes possible to step-by-step adjust the saturation of the point - from white to black. In this way, not only binary images are obtained (containing only white and black), but also halftone ones, consisting of shades of gray. Recently, thermal printers for home use, connected to a smartphone via Bluetooth or WiFi.

What is an inkjet printer

One of the most common types of printing devices. Uses liquid ink of several colors, mixing which allows you to create any other color. Suitable for printing photographs (on regular or photo paper), but not very practical for printing large amounts of text. An ink cartridge does not last long, so it is better to choose a laser printer for printing documents. Printed materials are not resistant to liquids; if water gets in, the image on the paper may bleed.

Most often used color model CMYK: colors Cyan (cyan), Magenta (magenta), Yellow (Yellow), Key color (key color - black). The ink gets onto the paper through holes in the print head, and fixation occurs when it dries. Unlike laser devices, additional heating is not required to seal the ink into the paper. Inkjet printer suitable for system installation continuous feed ink - special external containers with paint.

Important information! Regardless of whether CISS is installed, manufacturers inkjet devices Printers recommend refilling equipment only with original ink. The use of low-quality cheap analogues can lead to clogged nozzles on the head, on printed photographs or text documents white stripes will be visible.

What is a sublimation printer

The operation of such devices is based on the sublimation effect that occurs when dyes are heated. This effect involves the transition of solid powder dye into a gaseous state and further deposition under the surface of the paper. Provides slower print speeds than inkjet printers, but higher image quality. The durability of the resulting image is also high because the ink penetrates into the deep layers of the paper. Disadvantages include the high cost of equipment and consumables.

Dot matrix printers

Most old look printers, invented more than 50 years ago. Poorly suited for home use, but still used in some institutions. This is due to the reliability of matrix technology and the low cost of printing. Flaws - limited opportunities printing graphics and high level noise generated during operation of the device. There are also matrix devices for color printing, but the quality of the produced prints leaves much to be desired.

In design, this type of device is closest to a typewriter. The ink carrier is an ink ribbon located in a cartridge. To transfer ink to paper, the print head uses needles, the number of which depends on the device model and can range from 9 to 48. Each needle in a certain place presses the ink ribbon, pressing it to the paper and leaving a mark in the form of a single point. From such sets of points, symbols are formed.

Important! Older models of dot matrix printers are connected to the computer via a parallel interface ( LPT port). Modern motherboards often do not have such a connector, so you can use an LPT-USB adapter to connect.