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Glossary

Raster Image

An image made up of entirely pixels. It's direct opposite would be an entirely vector image; made up of only shapes that are mathematically filled.

Raster Image Processor (RIP)

A device that translates data into dots or pixels.

Rasterize

To render an image, pixel by pixel, vertically and horizontally.

Resolution

The number of dots or pixels of an image. The higher concentration of dots or pixels per inch, the more detailed the image will be. We requires a DPI/PPI of 300 or above.

Reader's Spreads:

Multi-page documents made into two page sections, so they are in the same sequence readers for printing, as compared to Printer's Spreads. Reader's Spreads need to be rebuilt before going on press to be Printer’s Spreads on the final press sheet.

Resolution

Amount of detail of an image on film, paper, computer screen, or disc. In digital prepress resolution is usually measured in Dots-Per-Inch (DPI).

Reverse

Type, graphic or illustration reproduced by printing ink around its outline, thus allowing the underlying color or paper to show through and form the image. The image 'reverses out' of the ink color. Also called knockout and liftout. In the case of process printing, this usually refers to white type on an colored background.

Red, Green, & Blue

These are most commonly used with television screens and computer monitors but are not used in offset printing. RGB files should be converted to CMYK. Colors may need to be adjusted after the conversion and may not appear correct on your monitor.

RGB

Abbreviation for red, green, blue, the additive color primaries.

Rich Black

This is made by mixing colors of ink with black in order to produce a deep, dark black on press. To create rich black for full-color process printing, your CMYK values should be Cyan: 60%, Magenta: 40%, Yellow: 40%, Black (Y): 100%

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