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Lecture 4

GCM 111 Lecture 4: Week 4 Part 1 Halftones, Linework, Tints and Screening

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Ryerson University
Graphic Communications
GCM 111
Jason Lisi

WK 4: HALFTONES, LINEWORK, TINTS AND SCREENING 02/05/2018 Lesson Objectives: To learn what a halftone is and the impact of halftones on the printing process To understand the difference between a halftone, tint and linework To explore the concept of line screens, screen angles, and the implications of each on 4-colour printing To learn the difference, pros and cons with regards to AM and FM screening Halftones: The world we live in is analog, and this includes colour Our eyes see is continuous tone colour A photograph shot by a film camera is continuous tone A painting or sketch is continuous tone When images are printed, the continuous tone colour is defined by a finite number of printing dots Printed images are known as halftone images Linework and Halftone: Halftones are images made up of varying sized dots equally spaced apart It is the varying dot size that gives the illusion of an area being lighter or darker Tints: Tints are a variation of a halftone Tints have same-sized dots equally spaced apart, and are used to create variations on a colour Halftones and Tints: Considerations for halftones and tints: They are affected by line screen ruling of the final printed job Line screen ruling is the resolution of the final printed pattern. It is measure in lines per inch (lpi).
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