- Raster vs Vector
- Raster images are composed of pixels while vector images are made of paths.
- Resolutions required for digital media and print media
-72 dpi
-300 dpi
-3000 lspi
- CMYK vs RGB
- CMYK is cyan, magenta, yellow, and black. Its a subtractive color model for print media, unlike RGB which is additive.
- Pantone colors
-Pantone Matching System (PMS) for matching colors for print media.
- Process vs spot color
- Process color is printed using CMYK. Better for print rather than individual spot color because of cost and effectiveness.
- Preflight analysis for print and for web
- Preflighting is the process of checking if the digital data required to print is present and valid. PDFs are a good standard to exchange pages.
- Font Management
- Font files need two parts, screen fonts and printer fonts. Screen fonts are bitmaps that imaged the letter shapes on the computer screen. Printer fonts are vector descriptions, in PostScript code, that had to be processed by a RIP at the resolution of the printer.
- Adobe Type 1 fonts with True Type
- True Type fonts contained bitmap data to draw the glyphs on a computer screen, and PostScript vector data to deliver to a RIP on a print engine. The True Type font file is a single file that contains both raster and vector data. True Type fonts came with all Microsoft software.
- Transparency
- The problem with WYSIWYG for transparency fall into two categories. The first problem is setting expectations so a designer can make a prediction of how the design will look when imaged on a given media. The second problem is the sheer proportions of the computational processes we are asking of a RIP. Post Script is a 3D language that allows a creator to prioritize elements on a page.
-Describe six pre-imaging file analysis processes that should be considered when developing a computer graphic for reproduction manufacture.
-Raster image processing (RIP) technologies that are common to all four manufacturing processes
-Colour management for repeatability, as a part of the RIP process
-Trapping to lithographic and flexographic specifications
-Transparency, which is a visual effect that has a great impact on imaging
-Imposition for pre-RIP and post-RIP for media utilization
-Preflight analysis and automation for computer file creation -Describe four major imaging technologies that utilize computer graphics to image on different substrates.
-Electrophotography
-Inkjet
-Lithography
-Flexography
-Describe the difference between raster data and vector data when creating a computer graphic file.
-Raster data is made up of pixels and each pixel has an associated value.
-Vector images just store the mathematical formulas that make the image. It takes less space.
-Compare the raster resolution of the data for a typical lithographic plate-setter compared to the resolution of a typical inkjet device.
-Lithographic needs 2,000-3,000 lspi.
-Inkjets needs 600-1,200 spi. -How many addressable values can be recorded in an eight-bit byte of computer data?
- 256
-What does the acronym WYSIWYG stand for?
-What You See is What You Get -What color matching library has been developed exclusively for process color printing inks (CMYK)?
- Pantone. -What can a page layout artist do to a graphics file if the transparent elements on the page are dropping out or not processing in the RIP?
-Use layers in document creation by isolating different effects on separate layers
-Allow the page layout software to raster the page elements
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