Principle and Application of Color Laser Printer (Part 2)
2. Differences in color laser printers
Since the color laser printer uses four-color toner, the above steps of generating the "negative image" and the "positive image" of the toner must be repeated four times, each time the toner of different colors is adsorbed, and the transfer drum will form Four-color images of cyan, magenta, yellow and black. It is precisely because the color laser printer has a step repeated four times, so the speed of color printing is significantly slower than the speed of black and white printing.
The latest color laser printing technology is the so-called "one-shot imaging" technology. The key to this technology is that the laser light emitting tube needs to be made sufficiently small, and four light emitting tubes corresponding to four colors must be placed at the position of an existing light emitting tube. At present, the cost of this process is too high, so "one-shot" color laser printers are not affordable for ordinary users, but there is no doubt that this is the future direction of development.
3. Color synthesis principle of color laser printer
Televisions and movies synthesize colors by emitting light by themselves. The synthesis rule is called "additional principle". The three primary colors are red, green, and blue, and the auxiliary color is "white." Printing and dyeing, paint is to form a color by absorbing certain light, so its rule is called "subtraction principle", the ternary color is cyan, magenta, yellow, and the auxiliary color is "black".
How is the color of the color laser printer synthesized? Take HP technology as an example to make an analysis. ImageRet2400 color layering technology is the technology used by HP. If it is determined that the basic resolution for printing is 600 DPI, an image with a resolution of 600 DPI can be calculated, and the center-to-center spacing between pixels is 42 μm. HP uses Ultra Precise toner with a diameter of 5 microns, which can actually achieve a 2400DPI effect. At a resolution of 2400DPI, the center-to-center spacing between pixels is about 10 microns. That is to say, if the final color printing result is a pixel resolution of 600 DPI, then on a pixel, 16 × 16 toner particles of cyan, magenta, yellow, and black can be used to add the blank to modulate the The color of pixels, because the human eye can no longer distinguish these subtle color particles, so what the human eye sees is the total effect after color mixing. In the end, how many colors this technology can provide, the calculation method is a classic example in the arrangement: an infinite number of small balls with five colors of cyan, magenta, yellow, black, and white are packed in five jars. Randomly draw 16 small balls from it and put them in an empty jar. How many possible results will be found? The calculated value is the number of colors that ImageRet2400 technology can theoretically achieve. According to the manufacturer, there are millions of colors. If according to the current processing level of nanomaterials, the diameter of carbon particles reaches 5 nanometers, it is not a problem, then the existing 5 micron toner particles can also be separated 1000 times along the diameter, you can boldly imagine the theory of laser printers With the prospect of the development of color technology, of course, the fineness of the particles has completely lost the meaning of continued thinning for human eye recognition.
Who should use the color laser printer first
The price of color laser printers is a bit high for ordinary home users. Besides, manufacturers may not even mean to sell to home users at present. So, which departments or occasions can be used as a part of color laser printers?
As stated at the beginning of this article, there is no reason to use a color laser printer, because the world is originally colored, and all of us can use the high-end output method of laser color printing. But as far as the current level of social consumption is concerned, only some people can use color laser printers 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 vivid and creative copy, or if you only occasionally have a copy, you can get it from a street printing service; if only For a small amount of materials, you can buy a color inkjet printer to print; if it is a department or enterprise with scale, strength, attention to its own modern image, and frequent printing business, then this color laser printer should be bought.
2. Commercial typing copy service agency 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 typing copy service agencies or advertising and design departments. Self-employed persons including printing various business cards and cards are obviously suitable for using color laser printers. The cost of printing a box of real color business cards cost 7 yuan should be able to solve, selling 15 yuan a box is also half the profit.
3. Small batch color printing business
The color laser printer is responsible for small batches of color printing, which is fast and easy, and the overall cost is lower. Developers of color laser printers are interested in occupying this application field.
4. Government or military departments
These departments generally solve the problem that the purchase cost of color laser printers should not be a problem. These departments may regularly upload some dozens or dozens of red-headed documents. The use of color laser printers does not require the application of specially printed document paper. Printing documents can be fast, convenient and accurate. Military departments often use color maps and maps, and it is most convenient to use color laser printers.
Color laser printing is not a ship that has seen the mast at sea, but a passenger ship that has been moored at the pier and is waiting to be anchored. What needs to be done is to buy a ticket whose price is not too low at present.
Color laser printing is no longer a dream.
BNF HARDWARE CO., LTD , https://www.bnfhandles.com