RGB refers to the primary colors of light, Red, Green and Blue, that are used in monitors, television screens, digital cameras and scanners. These are the inks used on the press in "4-color process printing", commonly referred to as "full color printing" or "four color printing". Therefore, it is physically impossible for the printing press to exactly reproduce colors as we see them on our monitors.
By doing it yourself, you have maximum control over the results. Generally, you should specify CMYK color builds that look a little lighter than you want, since the dots of ink "fatten up" on press, giving you more pigment on paper than you see on your monitor.
Be especially careful to keep backgrounds light if there is black or dark colored text over it, so that the text remains readable. Printing Knowledge Center Getting Started. Color Layout Specs Images Text. Have a Question? This is where the background starts of white like a sheet of paper in a printer and as more colour is added it gets darker until it turns black.
Technically if you added cyan, magenta and yellow together in equal and large amounts, it would create black. This is because CMYK is easier to standardise, thanks to the spectrum of colours available. That means we can keep all of your print products looking perfectly consistent throughout the print run. There are so many minute variations possible in RGB that it is nigh on impossible to guarantee consistency of colours across a print run, or even between different print runs.
This is why commercial printers use CMYK most frequently, as it helps to ensure consistency of colour across print runs and also across machines. This is because conversion from RGB to CMYK can result in colour variations, as the colours are created differently remember: additive versus subtractive.
The image below shows the entire spectrum of colours visible to the human eye. The black triangle marks the colours that can be reproduced with the RGB colour model. And the grey polygon illustrates the colours that can be produced by four-colour CMYK printing. World of Printing. Happy reading! How are the CMYK colours mixed? The CMYK colours: why only four?
You may also like. Five machines that changed the world of printing. When saying the colours are mixed together, it sounds like that they are put into a bucket and then mixed. It is not the case when it comes to mixing CMYK colours. It actually happens by a lot of small single-colour dots dropped onto the sheets next to each other. So when the printing is pressing it actually does not mix the colours, but it prints really small dots of cyan, magenta, yellow or key.
Since the dots are so small it actually makes our eyes and brain process the dots, so it looks likes colours and the design we wanted. When using CMYK colours to create the wished design or colour, then the CMYK colours are mixed together, and through subtractive synthesis, they create the colours that needed in the print.
The subtractive synthesis is a process where the primary colours Cyan, Magenta, Yellow, Black are printed on the sheet as fillers. When the light hits the sheets with the colours it passes through each of the colours, and each time it passes through a colour some of the light is absorbed by the ink. The remaining light is then reflected by the white sheet and this light is what shows the colours.
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