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Halftoning Strategies for Color Printing

Halftoning Strategies for Color Printing
Halftoning Strategies for Color Printing
Halftoning Strategies for Color Printing
Halftoning Strategies for Color Printing
Halftoning Strategies for Color Printing

Here is the explanation of how the "magic" of color printing depends upon the critical decisions made at the halftone micro structure level. From its first commercial applications in the 1890s to today, halftone structure choices for color printing have presented ongoing challenges to inventors and practitioners alike. The two competing approaches: random element versus regimented element, keep reminding us of the trade offs that are made during the color reproduction process.

This book explores halftone screening choices with the following quality-related factors in mind:


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Overview

Here is the explanation of how the "magic" of color printing depends upon the critical decisions made at the halftone micro structure level. From its first commercial applications in the 1890s to today, halftone structure choices for color printing have presented ongoing challenges to inventors and practitioners alike. The two competing approaches: random element versus regimented element, keep reminding us of the trade offs that are made during the color reproduction process.

This book explores halftone screening choices with the following quality-related factors in mind:

Resolution
Graininess
Moire Patterns
Color Fidelity

The constraints imposed by individual printing processes, substrates, original images and print quality markets, relative to the micro structure requirements of the printed image, reminds us that the optimal screening choice is situational dependent.

Author Gary G. Field draws upon his many years of halftone color experience to explain halftone system choices. Micro images of 33 samples are used to reveal the generally invisible elements which have been used for color pictorial printing. Accompanying explanations, include an expository first chapter and an integrated final chapter designed to guide halftone strategy choices. 

This book is intended for technical people involved in screening choice, be it during the times of screening system invention, or when making a selection from the array of screening choices that face the user. Printing managers and sales representatives, as well as print buyers, will also benefit from an understanding of the halftoning choices that must be made every day on the path to color printing.

Published by The Graphic Communication Institute at Cal Poly and distributed by RIT Press.

About the Author
Gary G. Field is a leading authority on color reproduction and print quality. His contributions to the printing industry in these fields have been widely recognized through such awards as the TAGA Honors Award, the Institute of Printing’s Gold Medal, and the GATF Robert F. Reed Technology Medal. 

Details

Publisher: Graphic Communication Institute at Cal Poly (02/2016)
ISBN-13: 978-0-9886739-1-5
Pages: 88
Size: 7 x 10 in.
Shipping Weight: 1lb

Table of Contents

The Pictorial Color Printing Challenge 1

Section 1: Early Tonal Rendition Strategies

     Mezzotint Engraved Intaglio Printing 8

     Hand-drawn Lithographic Plates 10

     Collotype Printing 12

     Single Line Screen Halftones 14

     Crossline Halftone Screening 16

     Metzograph Screening 18

     Grain Screen Techniques

Section 2: Photomechanical 4-Color Halftoning

     Four-color Halftone Challenges 24

     Same Angle Halftoning 26

     Combined Screening Strategies 28

     Elliptical Dot Halftoning 30

     Random Dot Contact Screens 34

     Special Effect Screens 36

Section 3: Process Halftoning Requirements 

     Letterpress Printing 40

     Offset Lithographic Printing 42

     "Conventional" Gravure Printing 44

     Flexographic Printing 46

     Screen Printing I 48

     Screen Printing II 50

     Electrophotographic Printing 52

     Inkjet Printing 54

     Five-color Lithography (Traditional) 56

     Six-color Lithography (Electronic) 58

     Six-color Flexography 60

Section 4: Electronic Halftoning

     Electronically Engraved Letterpress Plates 64

     Electronically Engraved Gravure Cylinders 66

     Grid-based Laser Halftoning 68

     Image-influenced Laser Halftoning 70

     Stochastic Halftoning 72

     Ultra Fine Halftone Screening 74

     Hybrid Structure Halftoning 76

     Special Effect Electronic Halftones 78

Halftoning Strategy 81

Appendix: Proportionally and Additivity Failure 85

About the Author 87

About the GrCI 88

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