Understanding the differences in Colour Display, Printing and Proofing is a complex, and confusing issue.
Computer screens, by default, make up the colours they display in RGB Mode (that is, every colour you see on your computer monitor is created out of differing values of Red, Green and Blue).
For this reason most of the standard software applications, or programs, supplied with your computer . . . such as Microsoft Word, Microsoft Powerpoint, Microsoft Publisher, Apple Works etc. use the RGB model for their colour palettes. This is usually ideal for displaying colour elements on screen and even printing out work on attached desktop Inkjet or Laser printers where the colour can be made-
However, both the Litho and Digital Printing processes used for Commercial printing use the
CMYK colour model . . . C = Cyan, M = Magenta, Y = Yellow, K = Black (K to avoid confusion with B for Blue). This is the reason why you will often have heard “Full Colour printing” referred to as “4-
We also suggest using a CMYK Black (ie a Black made-
Colour balance and reproduction can also be affected by the resolution at which the original element was first created in and the way it reacts to differing printing processes. Work created by most Web-
Furthermore, by their nature, computer screens (like televisions) display their image with light projecting out of the screen towards the eye of the viewer. Commercial printing will normally require images to have been produced at around 300dpi (dots per inch). Because our modern Litho or Digital printing machinery prints at a much higher resolution (between 2400 to 1270dpi), elements such as graphics or logos downloaded from web-
The complication doesn’t just end there though !!!! Different printing processes, and different printed materials, will also have an affect on the way your image displays after the printing process. Inkjet Printers spray ink from cartridges in one pass onto the paper; Digital Laser Printers lay down layers of Toner in several passes onto the paper; Litho Printing Presses print the Ink from four different plates onto the paper leaving blank minute layers where the edges of some colours will overlap over others so as not to compromise the join where two or more colours touch (known as “trapping”).
It is also essential to remember that the nature of modern printing processes, and the ever-
At momentoprint we will always endeavour to advise on how all these differences, and pitfalls,
may affect the final printing of your project. However, because of the hugely varying number, and technical quality, of software applications, colour palettes and production techniques, it is technically impossible to accurately predict how close to the printed proof your project will finally print . . . we must ALWAYS advise that the printed proof is a Visual Guide only !!!!!
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