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Desktop Publishing Carnegie-Mellon University Spring 2001

Learn about spot colors, four-color process, out of gamut colors, color reference systems, and color critical issues in desktop publishing. Understand color control, quality factors, and methods to achieve optimal color output.

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Desktop Publishing Carnegie-Mellon University Spring 2001

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  1. Desktop PublishingCarnegie-Mellon UniversitySpring 2001 • Dave WattersonArt Director, GATF • wttrsn@aol.com • dwatterson@gatf.org

  2. Spot Colors • Requires blending different inks into one ink to obtain the desired hue • Similar to mixing paints on a palette or for a house

  3. Four color Process • Dots, Dots, Dots • Patterns of dots (rosette pattern) simulate the desired hue

  4. Spot Colors • Require one press unit to apply desired color • Spot Color inks are more expensive than Process Inks • With process printing spot colors require a 5th unit or second pass through the press

  5. Process Colors • 4 units, Cyan, Magenta, Yellow Black • Can “simulate” Pantone colors • Process colors are cheaper than spot colors (you get what you pay for!)

  6. Out of Gamut • Some Spot colors CAN NOT be approximated by the process color system • Metallic inks • Neon Inks

  7. Color Reference Systems • Pantone • Trumatch • Focoltone • Toyo

  8. Pantone • Most universally recognized • Originally strictly a spot color system—13 original colors • Process approximations

  9. Trumatch • 4-color process system • Arranged by Hue, Saturation, Value • Very reliable—seldom used

  10. Focoltone • Stands for Four-Colour-Tone • More widely used in Europe and Asia • Different Inkset • Can check colors progressively

  11. Toyo • Great when using Toyo inks • Used most widely in Pacific rim countries

  12. Color Critical Issues • Surround • Paper • Densitometric verification

  13. Drawdown • On YOUR paper • With YOUR ink • By YOUR printer

  14. Color Control Bar • Measure/Calibrate/Evaluate • Star Targets • Dot Gain Scales • Solid Ink Density • Quarter- Mid- Three-quarter tone patches

  15. Controlling Color Quality • Quality of originals and separations • Paper Surface coatings and color • In color and density • Varnish or Coating

  16. Printer Controlled Factors • Ink Tack • Pressroom humidity • Paper conditioning

  17. Uncontrollable Factors • Color deficiencies • Viewing light • Age of piece—Environmental effects • Effect of sunlight

  18. Color Quality • Pleasing color—Basic printing • Match color—Good/Premium printing • Match original—Premium/ Showcase printing

  19. Contacting me • I don’t have an office on campus and really work all day • Please e-mail me and I will set up a meeting time as quickly as possible

  20. Thanks for your attention! Now let’s head over to the lab(CFA Room 318)

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