Principle and Application of Color Laser Printer (2)

2. Different points of the color laser printer

Since the color laser printer uses four-color toner, the above steps of generating the “negative image” of the electric charge and the “positive image of the toner” are repeated four times. Each time the toner of different colors is adsorbed, the final transfer drum will be formed. Qing, goods, yellow, black four-color image. It is because of the color laser printer has a repeat of four steps, so the color printing speed is significantly slower than black and white printing speed.

The latest color laser printing technology is the so-called "one-time imaging" technology. The key to this technique is to make the laser tube small enough to put down four tubes corresponding to four colors at the location of an existing tube. At present, the cost of this process is too high, so the “one-shot” color laser printer can be afforded by non-general users, but there is no doubt that this is the future direction of development.

3 color laser printer color synthesis principle

Televisions and films synthesize color by self-luminescence, and its synthesis method is called the “additive principle”. The three primary colors are red, green and blue, and the auxiliary color is “white”. Printing, dyeing, and coating are colors formed by absorbing some light, so its rule is called "subtraction principle". The ternary colors are blue, yellow and yellow, and the auxiliary color is "black".

How is the color of a color laser printer synthesized? Take HP's technology as an example. ImageRet2400 color tiering technology is the technology used by HP. If it is determined that the basic resolution of the print is 600 DPI, a 600 DPI resolution image can be calculated with a center-to-center spacing between pixels of 42 microns. HP uses Ultra Precise ultra-fine carbon powder with a diameter of 5 μm to actually achieve a 2400 DPI effect with a center-to-center spacing between pixels of about 10 μm at a resolution of 2400 DPI. That is, if the result of the last color printing is a pixel resolution of 600 DPI, then at a pixel point, 16×16 toner particles of cyan, magenta, yellow, and black can be used to add the blank to modulate the same. Pixel color, because the human eye has been unable to distinguish these subtle color particles, so the human eye sees the total effect of color mixing. How many colors this technology can provide in the end, and the calculation method is a classic example in permutation and combination: There are infinitely many small balls of five colors of blue, white, yellow, black and white. From the free to draw 16 balls into an empty jar, a total of how many possible outcomes? The calculated value is the number of colors that the ImageRet2400 technology can theoretically achieve, which is, according to manufacturers, millions of species. If the current nano-material processing level, the diameter of carbon particles is 5 nanometers is not a problem, then the existing 5 micron toner particles can also be separated by 1000 times in diameter, you can boldly imagine the laser printer theoretically With the color technology development vision, of course, after the particles are fine to a certain extent, the recognition of the human eye has completely lost its significance.

Who should first use a color laser printer

The price of color laser printers is a bit higher for ordinary home users. In addition, manufacturers may not even sell home users at the moment. Then, what departments or occasions can become the first part of a color laser printer?

As stated at the beginning of this article, there is no reason to use a color laser printer, because the world is inherently colored, and we all need laser color printing as this high-end output method. However, as far as the current level of social consumption is concerned, only a part of people can use the color laser printer first.

1. All departments that print business documents more frequently

It cannot be said that a color laser printer can determine the success or failure of a business event, but a colorful, creative copy or, if only occasionally, a copy, can be printed on the street printing service; if only A small amount of material, you can buy a color inkjet printer to print; If it is a large-scale, powerful, pay attention to their own modern image, print business, frequent departments or companies, then this color laser printer should not be bought.

2. Commercial typing and copying service or advertising and design department

If there is a certain amount of printing, the cost of laser color printing will be much lower than that of inkjet printing, which is obviously suitable for commercial typewriting and copying service companies or advertising and design departments. Including a variety of printed business cards, cards, self-employed, obviously also suitable for the use of color laser printers. Printing a box of real colorful business card costs 7 yuan should be able to solve, selling 15 yuan a box also half the profits.

3. Small batch color printing business

The color laser printers are responsible for the small-lot color printing work, which is quick and easy, and the overall cost is also lower. The color laser printer developer originally intended to occupy this application field.

4. Government or military departments

These departments generally solve the problem of purchase of color laser printers. These departments may regularly upload dozens or dozens of red-headed documents. The use of color laser printers does not require the use of specially-printed document papers. Printing documents can be done quickly, easily and accurately. The military department is also required to use color maps and maps frequently, and it is most convenient to use a color laser printer.

Color laser printing is not a ship that has seen the mast at sea, but a passenger ship that has been anchored at the dock waiting for anchoring. All that needs to be done is to buy a ticket that is currently not too low in price.

Color laser printing is no longer a dream.