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Archer
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The King said:Then I suppose a computer generated color shouldn't use the 4 primary colour anymore because you should have any colour generated by a binary code as for a graphic card which shows millions of colours.Archer said:Printing technology has advanced a lot thanks to computers.
Where I want to lead is that if you compare a old VGA display (16 colours), then a SVGA one (256 colours) and then current display, you see that dots are totally merged in the colours.
That's what I meant in my initial post.
First of all, computers use _three_ primary colors, Red, Green and Blue to achieve 16.7 Million colors (the maximum number of variations the human eye can percieve). So four primary colors in printing is more than enough.
You can not compare the RGB technology of computer monitors and graphics cards to the CMYK used in printing. There is no way to even start comparing the two technologies.
CMYK uses Cyan, Magneta, Yellow and Black in combination to produce any color by mixing these primary colors. You can achieve _any_ color this way.
RGB uses three dots (both in CRT and LCD as well as Plasma screens) for the monitor. These three dots can be illuminated or not, and by combining them, or changing the intensity of their illumination, you fool the human eye to percieve the colors.
The 16.7 million colors (32 bit) computers use are just number the computer use to identify the settings it should use to produce the correct signal for each pixel in the image.
There are conversion tables for converting a specific color in RGB to CMYK and vice versa. However, this is what computers do for you in today's printing industry. They handle that conversion automatically.
But the printing itself uses a process of mixing the mentioned colors of CMYK into the desired color of whatever you are printing.
Trying to compare the two are like trying to compare a jet engine to a car engine. They both do the same job (propelling a vehicle) but they are two very different things.