Tuesday, January 24, 2012

Chapters 1, 2, & 3 Summary

The following are definitions from Chapters 1, 2, and 3:

Finishing Processes: Once a job has been printed, there are several different processes it can go through to meet the client's requirements, including: various coatings and varnishes (aqueous, UV protection, etc.), lamination, chop or die cutting, string/hole drilling, addition of eyelets, double mounting, and many more.

Purpose of a RIP: A RIP (Raster Image Processor) turns vector images and text into high-resolution raster images. This is necessary because printers, without RIPs, need the images and text to be translated into a series of small dots.

Folding Dummy: A full-size sheet, folded to the specifications of the current job, and marked with page numbers to insure proper imposition and placement of pages during printing.

 VDP: VDP (Variable Data Printing) is a form of printing where components of the may be changed from one piece to the next, such as in direct mailings.

Imagesetter: This is a super-high resolution large-format printer that requires large rolls of paper, rather than sheets.

Two color print job: This is a print job which only uses two colors instead of the usual four.

Pica vs. Point: A pica is equivalent to 1/6 of an inch, while a point is 1/12 of a pica. Therefore, there are 72 points in one inch. Both of these measurements are used in the printing industry.

DPI, LPI, PPI: DPI (Dots Per Inch) is the common specification for resolution in most output devices, such as desktop printers and monitors. LPI (Lines Per Inch) is used in commercial offset printing. PPI (Pixels Per Inch) is an image's true resolution based on the density and size of pixels within the image. A higher PPI makes for a more detailed image.

Die Cutting process: This process is used to mass produce a set shape after printing. It can be used to round corners, cut slots, or cut pieces to be folded into various way such as cards or boxes. In this process, there is usually either a generic die or a custom-made die, depending on the needs of the client. Using increasing pressure, the die is pressed down onto the paper until the cut is made. This is usually an expensive process, especially if the die is custom.

Importance of Registration: Registration ensures that the overlapping colors used properly create a desired color.

CMYK vs. Spot Colors: Spot colors consist of one or more pre-mixed ink colors, which is general more expense than other processes. CMYK is a subtractive color process which uses four pigments (cyan, magenta, yellow, and black) to produce an image. CMYK is also the most common printing process.

                                                                                                                   

Sources:
http://www.talonzippers.com/trim_solutions/print/finishing_process/
http://desktoppub.about.com/cs/rip/a/rip.htm
http://printwiki.org/Folding_Dummy
http://en.wikipedia.org/wiki/Variable_data_printing
http://en.wikipedia.org/wiki/Imagesetter
http://www.dcfb.com/Pages/2-color-designs.html
http://forums.adobe.com/thread/370714
www.odeecompany.com/die-cutting.php
http://en.wikipedia.org/wiki/Printing_registration
http://www.visiondesign.com/2010/04/printing-cmyk-vs-spot-color/
Information for "Pica vs. Point" and "CMYK" colors received from previously taken courses at Pittsburg State University.

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