GRA 424 Study Guide - Midterm Guide: Total Quality Management, Iso 9000, Colorimetry

• School: Ryerson University
• Department: Graphic Communications
• Course: GRA 424
• Professor: Ian Baitz

Document Summary

Influences on tvi: ift, impression pressure, offset blanket, ink/water balance, plate blanket tension, press speed, paper factors, ink factors. Old swop (1977 2003: worlds first meaningful print specification , helped development for iso12647, defined target values, worked in the 1970"s but it was too loose by 2003, the main problem was that swop certified proofs didn"t match closely enough. Old gracol (1996 2003: commercial specifications based on iso 12647, modeled on swop gains, but on higher densities and brighter/whiter paper, the main problem was that there were multiple possible appearances and the gains were too high. Limitations of tvi calibrations: identical cmy tvi curves can produce different neutral contrast and/or gray balance, cmy tvi curves don"t control gray tonality because they ignore 3 colour trap, cmy tvi curves don"t control gray balance because they ignore ink trap, ink opacity and ink hue.