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A.Read the text again and complete the table lower with the most relevant information. Read your notes to class then.
| Types of printer | Technical specifications and other features |
| Dot – matrix | |
| ink – jet | |
| laser | |
| thermal | |
| photo setter | |
| plotter |
B.Look at the text again and put the words in italics into one of the colomns:
| Addition | Contrasting | Sequencing | Reason| cause |
| To begin with | |||
C. Tick the statements about ink – jet printers which are true:
| 1) Ink – jet printers are quicker than dot – matrix printers. | |
| 2) Ink – jet printers are cheaper than dot – matrix printers. | |
| 3) Ink – jet printers are not real competition for laser printers. | |
| 4) Ink – jet printers can easily print on envelopes, labels and transparencies. | |
| 5) Ink – jet co lour printers use four inks: magenta, yellow, cyan and black. | |
| 6) Ink – jet printers are ideal for workgroups and large businesses. | |
5.Д/з: переклад, переказ, повторення граматичного аспекту попереднього заняття (вище).
Роздатковий матеріал до заняття № 23
Reading
Types of printers
Printing is the final stage in creating a document. That is the purpose of the printers joined to your computing equipment. Since the results you can obtain with different types of printers will vary substantially, here is a guide to help you decide which one is most suitable for your needs. To begin with, it must be taken into account that printers vary in cost, speed, print quality and other factors such as noise or compatibility. In fact, printing technology is evolving so quickly that there is always a printer for every application or personal requirement.
Dot-matrix printers use pins to print the dots :s required to shape a character. They print text and graphics and nowadays some of them can print up to 450 characters per second (cps); however, they produce relatively low resolution output - 72 or 144 dots per inch. This level of 23 quality, while suitable for preliminary drafts, is not recommended for reports or books that have a wide audience. They are slower than laser printers but much cheaper.
One common type of non-impact printer is an ink-jet printer. It operates by projecting small ink droplets onto paper to form the required - image. This type of printer is quite fast, silent and not so expensive as a laser printer.
Nevertheless, you can expect high quality results because there are some ink-jet printers on the market with a resolution of 720 dpi.
Bubble-jet printers work the same way.
Laser printers produce output at great speed and with a very high resolution of 600/1,200 dpi. lb They scan the image with a laser beam and transfer it to paper with a special ink powder. They are constantly being improved. In terms of speed and image quality they are preferred by experts for different reasons: they have a wider range of scalable fonts, they can emulate different language systems, they can produce graphics, and they have many other advantages. It goes without saying that they are still expensive.
We must not forget to mention thermal printers. They use heat, a special kind of paper and electrosensitive methods. They are silent and considered to be inexpensive. However, some colour models that emulate HP (Hewlett Packard) plotters cost too much to be included in the same category.
Photosetters can be regarded as an attractive alternative. They do not print on regular paper, but on photographic paper or microfilm. They can produce output with a resolution of over 2,000 dots per inch. In addition, they are extremely fast. Although they produce the highest quality output, they have one important drawback: they are the most expensive.
Finally, plotters are a special kind of printer. Plotters use ink and fine pens held in a carriage to draw very detailed designs on paper. They are used for construction plans, engineering drawings and other technical illustrations.
Tasks to the text