Color Managing for Papers Containing Optical Brightening Agents

Rochester Institute of Technology RIT Scholar Works Theses 12-2014 Color Managing for Papers Containing Optical Brightening Agents R. Scott Millward Follow this and additional works at: https://scholarworks.rit.edu/theses Recommended Citation Millward, R. Scott, "Color Managing for Papers Containing Optical Brightening Agents" (2014). Thesis. Rochester Institute of Technology. Accessed from This Thesis is brought to you for free and open access by RIT Scholar Works. It has been accepted for inclusion in Theses by an authorized administrator of RIT Scholar Works. For more information, please contact [email protected]. Color Managing for Papers Containing Optical Brightening Agents by R. Scott Millward A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in the School of Media Sciences in the College of Imaging Arts and Sciences of the Rochester Institute of Technology December 2014 Primary Thesis Advisor: Professor Robert Chung Secondary Thesis Advisor: Professor Robert Eller School of Media Sciences Rochester Institute of Technology Rochester, New York Certificate of Approval Color Managing for Papers Containing Optical Brightening Agents This is to certify that the Master’s Thesis of R. Scott Millward has been approved by the Thesis Committee as satisfactory for the Thesis requirement for the Master of Science degree at the convocation of December 2014 Thesis Committee: __________________________________________ Primary Thesis Advisor: Professor Robert Chung __________________________________________ Secondary Thesis Advisor: Professor Robert Eller __________________________________________ Graduate Director: Professor Christine Heusner __________________________________________ Administrative Chair, SMS: Professor Twyla Cummings Acknowledgements I would like to recognize and thank Professor Robert Chung, my primary thesis advisor, for his patience and support throughout my research and the writing of this thesis. He inspired my interest in standards and color measurement that helped direct my enthusiasm for this topic. I would also like to thank Professor Mitchell Rosen, my original secondary thesis advisor. Our meetings may have been few and short but his interest gave me confidence in what I was doing. I would also like to express my gratitude to Professor Robert Eller for stepping in as my secondary thesis advisor at the last minute. Your time, editing and input on this document are very appreciated. Thank you to all the faculty and staff of RIT who support and encourage graduate students like myself in their education, interests and research. I would also like to thank the peers I met at RIT including my classmates for all their stimulating lunchtime discussions. I also found a friend and fellow “OBA guy” in Brian Gamm, who assisted me with the illuminant measurements needed for this work. Finally, I would like to thank my wife Kimberly and the rest of my family, as well as my colleagues at Ryerson University’s School of Graphic Communications Management for all their support, encouragement, patience and gentle nudging to whom I owe a lot. iii Table of Contents Acknowledgements ............................................................................................................ iii List of Tables .................................................................................................................... vii List of Figures .................................................................................................................. viii Abstract ............................................................................................................................... x Chapter 1 : Introduction ..................................................................................................... 1 Introduction ......................................................................................................................1 Statement of the Problem .................................................................................................2 Significance of Topic .......................................................................................................6 Reason for Interest in Topic .............................................................................................8 Definition of Terminology ...............................................................................................8 Chapter 2 : Literature Review ........................................................................................... 10 Introduction ....................................................................................................................10 Fluorescence/Brightness ................................................................................................11 History of OBAs ............................................................................................................11 Application of OBAs .....................................................................................................12 Color Management .........................................................................................................13 Color Measurement ........................................................................................................18 Measuring Fluorescence ................................................................................................20 Visual Evaluation ...........................................................................................................21 Other OBA Concerns .....................................................................................................22 Summary ........................................................................................................................23 Chapter 3 : Research Objectives ....................................................................................... 24 iv Research Questions ........................................................................................................24 Hypothesis......................................................................................................................25 Chapter 4 : Methodology .................................................................................................. 26 Introduction ....................................................................................................................26 Materials and Equipment ...............................................................................................27 Substrates ...................................................................................................................27 Proofing Systems .......................................................................................................28 Viewing booth ............................................................................................................28 Measuring instruments ...............................................................................................28 Software .....................................................................................................................29 Preparation of the reference prints .................................................................................29 Characterization of reference prints using current procedures ......................................30 Non-brightened reference print ..................................................................................30 Brightened reference print .........................................................................................31 Adjustment of measured characterization data for the brightened reference print – Concept #1: Averaging ..................................................................................................31 Adjustment of measured characterization data for the brightened reference print – Concept #2: Simple scaling of the OBA effect ..............................................................32 Theory ........................................................................................................................32 Initial characterization measurements ........................................................................33 Measuring light sources .............................................................................................34 Calculating adjustment scalar ....................................................................................35 Adjusted characterization dataset ..............................................................................35 Generating ICC profiles from characterization data ......................................................36 Preparation of the proofing system ................................................................................36 Proofing .........................................................................................................................37 Demonstration of the OBA effect ..................................................................................37 Limitations of current color management of OBAs ......................................................38 Analysis of final proofs ..................................................................................................38 v Paired comparison setup ............................................................................................38 Samples ......................................................................................................................39

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