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Renzo Shamey

CIBA Distinguished Professor

Textiles Complex 3145


After obtaining a Bachelor of Engineering in a 5 year program offering a mixture of engineering and chemistry courses in 1989, Prof. Shamey worked in textile mills (dyeing and finishing industry) for three years in various capacities from process engineer to section manager. Prof. Shamey continued his Master of Science degree in Dyeing and Finishing (with Distinction) jointly at the “Colour Chemistry Department” and “School of Textile Industries” of Leeds University in 1993 working on a colour science project under the direction of Dr. James. H. Nobbs. He continued to work with Dr. Nobbs for four years during his PhD program between 1993 and 1997. His work was focused on modelling and real time control of dye concentration in the package dyeing process. After completing his PhD he worked as a post doctoral research associate at the Colour Chemistry Department of Leeds University on an industrial project sponsored by Unilever between 1997 and 1998. Prof. Shamey then joined Heriot-Watt University in Scotland in 1998, as Lecturer (Assistant Professor) in Dyeing, Printing and Finishing. He received a special commendation for the university’s Excellence in Teaching Award in 2002. In 2003, Prof. Shamey joined the TECS Dept. at NCSU. He served as Program Director for the undergraduate Polymer and Color Chemistry (PCC) and the graduate Textile Chemistry (TC) programs from 2009 till 2018.

Prof. Shamey served as the President of Inter-Society Color Council (USA, 2018-2022). He received the Fellowship of the Society of Dyers and Colourists and a Chartered Colourist (CCol) in the UK in 2010. He was selected a University Faculty Scholar at NCSU in 2014. He is an honorary professor at Tianjin Polytechnic University (China).

Prof. Shamey is the co-author of several books and book chapters, most notably, “Modeling, Simulation and Control of the Dyeing Process”, and “Pioneers of Color Science” and is the editor of the 2nd edition of the “Encyclopedia of Color Science and Technology”.

During his graduate studies Renzo Shamey was elected the Academic Secretary of the United Kingdom National Postgraduate Committee (NPC) as well as the President of the Postgraduate Representative Council (PGRC) of Leeds University between 1995-1998. He was a state champion in freestyle wrestling for several years in his school years. He enjoys playing badminton, traveling, and learning new languages.


Research Interests

  1. Colour Science and Technology

    Fifteen PhD and five Masters projects have been completed in these areas. Three PhD projects are currently underway on perception & modelling of texture, and characterization of color of complex patterns using digital cameras. Other projects involve assessment of color difference formulae and development of visual datasets.

  2. Computer Applications in Textile Wet Processing

    Several PhD projects have been completed in this field. The current work focuses on the development of deep learning approaches and comprehensive AI systems to troubleshoot dyeing/printing problems. Other areas involve the examination of the effect of various parameters in real time on individual dyes in a dye admixture.

  3. Dye Application and Textile Chemistry
    • Dyeing of Polyolefins (Polypropylene, PE)
    • The Effect of Colorants on Ageing and Degradation of Fibers
    • Dyebath composition
    • Natural colorants

    Several PhD projects have been completed in these fields. Works of interest include exploring novel techniques to dye polyolefins, as well as the study of photodegradation of fibers as a result of inclusion of dyes in fiber.


  • Society of Dyers and Colourists, UK – Fellow
  • Inter-Society Color Council ISCC – Former President
  • American Association of Textile Chemists & Colorists – Senior Member
  • Optical Society of America – former member
  • Society for Imaging Science and Technology – former member
  • Fiber Society – former member
  • Colour Group, UK; – former member
  • The Society for Modeling and Simulation International – former member
  • The International Institute of Informatics and Systemics – former member


  • PCC 101 – Introduction to Polymer and Color Chemistry,
  • PCC 104 – Introduction to Polymer and Color Chemistry, Lab,
  • PCC 301 – Technology of Dyeing and Finishing (PCC majors),
  • PCC 304 – Technology of Dyeing and Finishing, Lab,
  • PCC 302 – Technology of Textile Wet Processing,
  • PCC 302 – Technology of Textile Wet Processing, Lab,
  • PCC 350 – Introduction to Color Science and Application,
  • PCC 354 – Introduction to Color Science and Application, Lab,
  • PCC 490 – Undergraduate Research Coordinator,
  • PCC492 (PCC450) – Advanced Colorimetry and Color Appearance Models,
  • TC 705 – Theory of Coloration,
  • TC 706 – Color Science,
  • TC 707 – Color Science Laboratory,

Additional Information

Current PhD Students

  1. Zhenhua Luo
    2023, PhD, Chair:Shamey
    Modelling Texture
  2. Jiaying Wu
    2023, PhD, Chair, Shamey
    Effect of Background on Color Difference of Multicolored Objects
  3. Hao Cui
    2023, PhD, Chairs, Shamey, Seyam
    An image-based diagnosing system for textile coloration defects -Textile Vision

Postdocs, and Visiting Scholars

  1. Dr. Zhong Xian, Visiting Scholar, Zhejiang Science and Technology University, China 2019-2020
  2. Ms. Liu Yang, Visiting Scholar, Donghua University, China, 2018-2020
  3. Dr, Yuan Xiaohong, Visiting Scholar, Donghua University, China, 2019-2020
  4. Dr. Ning Zhang, Visiting Scholar, Jiangnan University, China, 2018-2019
  5. Dr. Ran Wang, Visiting Scholar, Beijing Institute of Fashion Technology, China, 2018-2019,
  6. Dr. Yu Lin, Postdoctoral Associate, 2014- 2019
  7. Ms. Ge Zhang, Visiting Scholar, Jiangnan University, China, 2017- 2018
  8. Ms. Meiqin Wu, Visiting Scholar, Donghua University, China 2016-2018
  9. Mr. Zhongjian Li, Visiting Scholar, Jiangnan University, China, 2016- 2017
  10. Mr. Chen Zhe, Visiting Scholar, Jiangnan University, China, 2016- 2017
  11. Dr. Lin Luo, Postdoctoral Assistant, 2015-2016
  12. Dr. Juan Lin, Postdoctoral Assistant, 2013-2014
  13. Ms. Shaungyan Wu, Visiting Scholar, Jiangnan University, China, 2015
  14. Ms. Jiajun Liu, Visiting Scholar, Wuhan Textile University, China, 2015
  15. Dr. Eunjou Yi, Visiting Scholar, Jeju National University, Korea, 2012-2013.
  16. Dr. Yuzheng Lu, Visiting Scholar, Jiangnan University, China, 2012-2013.
  17. Dr. Khaled El-Tahlawy, Research Associate, 2006-2008
  18. Dr. Maqbool Hussain, Visiting Scholar, Pakistan, 2008- 2010
  19. Ms. Merce Alsina Costabella, Visiting Scholar, Spain, Jan 2008- 2008
  20. Dr. Senthilkmar Muthusamy, Visiting Scholar, India, 2006- 2007
  21. Mr. Mahmud Elgammal, Visiting Scholar, National Research Center, Egypt, 2008

Former Graduate Students 

  1. Nian Xiong
    Omni Vision, 2023, PhD, Chair: Shamey
    Quality Control of Multicolored Objects Using Imaging Systems
  2. Jiajun Liu
    Data Analytics, TransUnion, 2020, PhD, Chairs, Chapman- Shamey
    Inkjet Printing of Textiles
  3. Muhammad Zubair
    Organic Dyes and Pigments, 2020, PhD, Chair, Shamey
    Development of a diagnostic expert system for the coloration of blend fibers
  4. Kazi Islam,
    202x, PhD, Chair, Shamey
    Development of a diagnostic expert system for the coloration of polyamide and acrylic fibers
  5. Sonali Mandal
    Director of Textile Research & Testing, 2017, PhD, Chairs: Hauser-Shamey
    Colorimetric characteristics of cationized cotton dyed with anionic colorants
  6. Sajeesh Kulappurath
    Subject matter expert, color, Apple, 2017, PhD, Chair, Shamey
    Assessment of Texture
  7. Heekwang Koo
    2018, MS, Chair, Shamey
    Dermatological Application of Colorants
  8. Daniel Hines
    2018, MS, Chair, Shamey
    Assessing the role of glare in colorimetric use of cameras
  9. Renbo Cao
    Camera Algorithm Engineer, Apple, USA, 2015, Chair: Shamey
    Development of an instrumental technique for quality control of complex colored patterns.
  10. Weethima Sawatwarakul
    Johnston Printing, Thailand, 2014, Chair: Shamey
    Development of a diagnostic expert system for coloration of protein fibers.
  11. Juan Lin
    Reiko, USA, 2013, PhD, Chair: Shamey
    Factors Affecting the Perception and Measurement of Optically Brightened White Textiles.
  12. Berdan Kalav
    Lecturer, Istanbul Technical University, 2012, PhD, Chairs: Shamey- Dayioglu
    Development of a diagnostic expert system for inkjet printing of cotton substrates.
  13. Gang Fang
    Qualcom, USA, 2012, PhD, Co-Chairs: Shamey-Hinks
    Development of Instrumental Techniques for Color Assessment of Camouflage Patterns.
  14. J. Reid Clonts
    2011, PhD, Co-Chairs: Shamey-Hinks
    Perception of Blackness and the Formulation of a Blackness Index
  15. Mehmet Ozturk
    Research Associate, Cornell University, 2011, PhD at Istanbul Technical University, Co-Chairs: Shamey-Dayioglu
    Optimization & Study of Exhaustion Profiles in the Dyeing of Cotton.
  16. Changhai Xu
    Professor & Dean, Jiangnan University, Wuxi, China, 2009, PhD, Co-Chairs: Hinks-Shamey
    The Chemistry and Perception of Fluorescent White Textile Materials
  17. Woo Sub Shim
    Research scientist, Korea, 2009, PhD, Co-Chairs: Shamey-Joines                                                               Development of a Diagnostic Expert System for the Dyeing of Polyester Substrates
  18. Lina Maria Cardenas
    Assistant Professor, Chile, 2009, PhD, Co-Chairs: Shamey-Hinks,
    Evaluation of Variability in Visual Assessment of Small Color Differences
  19. Kamran Iqbal
    Textile Research & Innovation Center, Pakistan, 2008, MS, Chair: Shamey
    Development of a visual dataset around a CIE high chroma blue color center.
  20. Seung Geol Lee
    Associate Professor, Korea, 2007, MS, Co-Chairs: Shamey-Jasper
    Assessment of Metrics in Color Spaces
  21. Reduwan Bilal Shah
    Postdoctoral Research Fellow, UK, 2007, PhD, Co-Chairs: Christie-Shamey
    The Molecular Design, Synthesis and Application of Photochromic Dyes on Protein Substrates
  22. Mukesh Kumar Sinha
    Assistant Director, defense research labs, India, 2006, PhD, Co-Chairs: Shamey-Christie
    An Investigation of the Photodegradation of a Nylon Support Net used in Exhibition of Historic Textiles
  23. Mr. Mohammad K. Basher
    Sales manager, Canada, 2005, MPhil, Co-Chairs: Wardman-Shamey
    An Investigation on the Characteristics and Role of Surface Deposits Formed on the Wool Fiber During the Dyeing Process with Metal-Complex Dyes and Minimising Their Formation.
  24. Syed Iqbal Ahmed
    Process Engineer, UK, 2005, PhD, Co-Chairs: Shamey-Mather
    Coloration of Polypropylene: Prospects and Challenges
  25. Xiaoming Zhao
    Professor, Tianjin Polytechnic University, China, 2004, PhD, Co-chairs: Shamey-Wardman
    Modelling of the Mass Transfer and Fluid Flow in Package Dyeing Machines
  26. Tanveer Hussain
    Rector, National Textile University, Pakistan, 2004, PhD, Co-Chairs: Shamey-Wardman
    A Knowledge Based Expert System for the Dyeing of Cotton.

Undergraduate Research Projects

  1. Marian Talip
    2023, The effect of water hardness on dye build-up
  2. Samriddhi Jaichand
    2023, The effect of water hardness on dyeing polyester
  3. Savannah Schroeder
    2022, Calibration dyeing of polyester with Terasil dyes
  4. Haley Lindell
    2017, The effect of LEDs on light fastness of conventional and cationic cotton dyed with reactive dyes
  5. Emily Rundell
    2017, Assessment of the degree of blackness of commercial colorants
  6. Kaylin Sutton
    2017, The effect of fabric color on perceived facial attractiveness of Caucasian and Chinese
  7. Anne MacLean
    2014, Threshold determination of “simultaneous contrast” and “spreading”
  8. Haley Barkely
    2013, Development of a perceptually geometric gray scale on polyester woven substrate
  9. Chris Ohnstad
    2013, Effect of certain chemical and mechanical treatments on colorimetric attributes of polyester substrate dyed with disperse dyes
  10. Sarah Shepherd
    2011, Brunescence and Its Influence on Assessment of Small Color Differences.
  11. Troy Tomassino
    2011, Development of a Sample Set around a CIE High Chroma Blue Color Center
  12. Sarah Jane Simpson
    2011, Development of a ‘gray’ hue circle.
  13. Adam Stegall
    2010, Development of a fabric based gray scale for assessment of color change
  14. Michael Sedito
    2007, Determination of unique hue based on Munsell chips
  15. Hal Walrod
    2007, Establishing a translucency index for textiles using translucent compression garments
  16. Kevin Bullock
    2006, Determining the Effect of Relative Humidity, Fabric Structure, and Finishing on Colorimetric Properties of Direct Dyed Cotton Fabrics
  17. Karmen Cressman Miller
    2005, Assessment of large color differences using DigiEye and Datacolor spectrophotometers

Area(s) of Expertise

Color Science
Dyeing and Finishing
Polymer Science
Polymer/Fiber/Textile Processing


View all publications 


Date: 09/01/21 - 3/31/24
Amount: $150,012.00
Funding Agencies: Nike, Inc.

The goal of the proposed project is to employ the fundamental principles of color science and coloration technology to characterize the measured color of specific Nike products, made from polyesters substrates, with respect to the quality of water used in the process. The main objective is to provide a repeatable approach to matching reference target colors within a production setting and among different sites and understanding the role of water hardness on the outcome of the process. This work is expected to improve the understanding of process parameters and in turn enhance the agreement between predicted and measured colors of products as a function of processing parameters. It will also improve the agreement among results reported by various suppliers.

Date: 05/10/21 - 9/10/21
Amount: $2,300.00
Funding Agencies: Patagonia

Booth use - Color Science Laboratory

Date: 09/23/13 - 3/01/19
Amount: $1,318,524.00
Funding Agencies: US Army

The present proposal has the objective to develop, validate and implement an imaging system for the color quality control and assessment of Operation Enduring Freedom (OCP) camouflage substrates. This work comprises the following main components: 1) Obtaining a statistically valid set of pass and fail responses for a large set of camouflage substrates from a group of expert color assessors that repeat their judgments on multiple trials which will be used to train the system. 2) Developing a numerical algorithm based on an imaging technique that utilizes the above visual criteria to establish instrumental acceptability boundaries. 3) Comparison of the performance of the numerical models used in the imaging techniques against visual judgments for a new set of test samples. 4) Prediction of P/F judgments for a variety of substrates. In order to improve the effectiveness of the proposed technique, different types of material (woven, knitted, nonwoven, & different blends) that are commonly utilized in the production of camouflage material in different sectors, should be made available to be visually rated and to train the system.

Date: 02/01/17 - 12/31/17
Amount: $138,888.00
Funding Agencies: Lubrizol Corporation

The thrust of this 1-year project is to examine processes and mechanisms leading to improvements in the wet and dry crock fastness on cotton, while maintaining the color gamut. In this regard, fundamental studies in ink/substrate interactions will be undertaken using instruments in the NCSU Surface Science Laboratory. These studies will involve the 1) comparison of Lubrizol (LZ) Gen 1/Gen2 and rotary screen pigment inks on cotton and 2) evaluation of LZ binder design, ink formulation and pretreatment using SPECS XPS, TOF-SIMS, and FIB-SEM methods.

Date: 01/01/13 - 12/31/16
Amount: $163,236.00
Funding Agencies: Cotton, Inc. (No pre-award costs/accounts allowed)

The objectives of this proposal are two-fold. The first is to determine a commercially feasible way to prevent excess cationic sites on cationized cotton. The second objective is to develop a mathematical model that will allow the optimal cationization level to be calculated for a specific dye formula.

Date: 09/08/14 - 4/15/16
Amount: $49,991.00
Funding Agencies: Lubrizol Corporation

The objective of this investigation is to characterize the Sponsor's pre-treatment process by 1) performing an assessment and comparative analysis of the interaction between the pre-treatment and various commercially available inks on textiles and 2)characterizing the color shift that sometimes occurs with dark colored textiles following pre-treatment application.

Date: 07/01/10 - 3/31/13
Amount: $281,437.00
Funding Agencies: US Army - Soldier Systems Center (Natick)

The proposal is aimed at developing and deploying a rapid, accurate, and repeatable digital color assessment technology and image processing solutions to analyze color attributes and control quality of universal camouflage print patterns. Phase I of this project, funded by the US Army Soldier Equipment Division, aims to develop a working protocol for the instrumental assessment of Military Textiles that improves the consistency of quality control measures as well as communication throughout the supply chain and supports industrial applications and decision making process. This Phase II proposal aims to extend the work initiated during Phase I activity and deliver a reproducible instrumental methodology, verified through multiple site assessments and combine the technology with statistically valid perceptual assessments of the camouflage fabrics.

Date: 04/21/08 - 6/30/10
Amount: $314,981.00
Funding Agencies: US Army - Soldier Systems Center (Natick)

The US Army Solider Equipment division requires a rapid, accurate, repeatable and reproducible instrumental assessment protocol for the Universal camouflage print fabric. This proposal aims to deliver an instrumental methodology that can be implemented into the camouflage fabric supply chain rapidly and at reasonable cost.

Date: 04/01/08 - 3/31/09
Amount: $2,540.00
Funding Agencies: NCSU National Textile Center Program

The primary goal of the proposed research is to develop an accurate and precise integrated color control system that can be easily implemented throughout the US textile industrial manufacturing complex, from product designer through to merchandiser, dyer, retailer and consumer. Fundamental research in the following areas must be addressed to achieve this goal: 1) Develop illuminant data that correlate with the color rendering of lighting used in standard light booths (especially daylight simulators) and lighting used in retail stores, 2) Develop an accurate color inconstancy model and integrate it into color formulation software, 3) Establish the minimum possible error in color difference assessment via a well-controlled, statistically valid color difference experiment that is replicated by at least 3 independent observe panels from different regions of the world (U.S., Asia and Europe).

Date: 07/01/06 - 10/31/08
Amount: $478,806.00
Funding Agencies: US Dept. of Commerce (DOC)

The current grant application is submitted by North Carolina State University and Oak Ridge National Laboratory. The proposal is aimed at developing and deploying an extensible optical reader technology and image processing solutions to identifying and analyze textile tags for the US Textile and Apparel Industry as well as US Customs through integration of a robust reader system into a design that supports commercial and industrial applications.

View all grants