Artwork considerations

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Presentation transcript:

Artwork considerations Ray Weiss, SGIA

ARTWORK Do you have the right artwork?

Do you have the right artwork? File type - Raster images TIF JPG PNG BMP

Do you have the right artwork? File type - Vector images EPS PS

Do you have the right artwork? PDF Version is from the Best Practices from IDEAlliance Guide to Print Production File type - Combined – Raster and EPS PDF (X-1a:2001 or PDF/X-4:2010) JDF (Job Definition Format) XML (Extensible Markup Language) – encoding docs

Definitions PPI – Pixels per Inch LPI – Lines per inch Newsprint 85-110 lpi Sheet offset 150 lpi Fine quality art 175-200 lpi DPI – spec for resolution of output devices

File size - Resolution Printhead resolution Horizontal resolution Typically a function of carriage speed and firing frequency Vertical resolution Dot spacing in direction of media path (dependent on native resolution) Native resolution is the actual number of nozzles within a 1” space. So for most Epson print heads they have 180 nozzles within a 1” print head for a native resolutions of 180 dpi.

File size - Resolution Printhead resolution True Resolution Dots lined up in an inch with no overlap Addressable resolution The capability to place dots with closer spacing and more overlap Print heads have to manage the dots so that the ink dots overlap and white doesn’t show through (until they can jet square dots, this will be the issue).

File size - Resolution Viewing Distance 2 ft / .6 m = 300 dpi

File size - Resolution File Size / Storage Resolution, Image Size, Bit Depth and Color Mode Bit Depth (8 bit example) 8 or 16 bits Color Mode (RGB example) (RGB or CMYK) 36” x 36” RGB

File size - Resolution File Size / Storage Resolution, Image Size, Bit Depth and Color Mode Bit Depth (8 bit example) 8 or 16 bits Color Mode (CMYK example) (RGB or CMYK) 36” x 36” CMYK

Color Settings Photoshop and Illustrator Defaults are sRGB and US Web Coated (SWOP) v2 Small gamuts for most digital printers Better settings are: Adobe RGB (1998) Coated GRACol 2006 (ISO 12647-2:2004) or GRACol2013_CRPC6

Color Settings Photoshop and Illustrator Honor or ignore embedded profiles

Color Settings Verification

Thank You Ray Weiss, SGIA ray@sgia.org 703.359.1305