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:
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.
Publisher: Graphic Communication Institute at Cal Poly (02/2016)
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