REGISTERED COLOUR
Registered Colour in print is a mix of 100% of each colour represented within a print job. The Crop or Tick Marks are usually set to this colour definition so that the are produced on all colour plates. These help alignment and accurate trimming with the guillotine.

REAM
500 sheets of paper

REGISTER
Accurate positioning of images on a sheet relative to one another.

RESOLUTION
Refers to the degree of detail of an image. It is usually measured in pixel per inch (ppi), dots per inch (dpi) or lines per inch (lpi). A high resolution gives a high quality image and vice versa.

REVERSED OUT
Type appearing white on a black or colour background which is either a solid or a tint.

RGB
The RGB colour model is an additive colour model in which red, green, and blue light are added together in various ways to reproduce a broad array of colours. The name of the model comes from the initials of the three additive primary colours, red, green, and blue.
The main purpose of the RGB colour model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers, though it has also been used in conventional photography. Before the electronic age, the RGB colour model already had a solid theory behind it, based in human perception of colours.
RGB is a device-dependent colour space: different devices detect or reproduce a given RGB value differently, since the colour elements (such as phosphors or dyes) and their response to the individual R, G, and B levels vary from manufacturer to manufacturer, or even in the same device over time. Thus an RGB value does not define the same colour across devices without some kind of colour management.
Typical RGB input devices are colour TV and video cameras, image scanners, and digital cameras. Typical RGB output devices are TV sets of various technologies (CRT, LCD, plasma, etc.), computer and mobile phone displays, video projectors, multicolour LED displays, and large screens as JumboTron, etc. Colour printers, on the other hand, are not RGB devices, but subtractive colour devices (typically CMYK colour model).

ROUTER
A special-purpose computer (or software package) that handles the connection between two or more networks. Routers spend all their time looking at the destination addresses of the packets passing through them and deciding which route to send them on.

RIP
Raster Image Processor. A processor which converts files into a format ready for printing.

 

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