Renzo Shamey

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 obtained a Master of Science degree in Dyeing and Finishing (with Distinction) jointly from 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 at the Colour Chemistry Dept. of Leeds University.

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 a dyebath. 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 joined Heriot-Watt University in Galashiels (Scotland) in 1998, as Lecturer (Assistant Professor) in Dyeing, Printing and Finishing where he established the Automation and Novel Coloration Research Group. He was nominated for a University wide Excellence in Teaching Award in 2002 and was specially commended.

In 2003, Prof. Shamey joined the TECS Dept. at NCSU and served as Polymer and Color Chemistry (PCC) program director since 2009 till 2018.

Prof. Shamey is the President Elect of Inter-Society Color Council (USA) and a Fellow of the Society of Dyers and Colourists and a Chartered Colourist (CCol) (UK). He is also an honorary professor at Tianjin Polytechnic University (China).

Prof. 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 free style Olympic wrestling for several years. He enjoys playing badminton and basketball in his spare time as well as traveling, learning new languages, and classical guitar.

Research

Research Interests

1. Colour Science and Technology
   • Color Difference
   • Color Perception especially blackness, whiteness, grays, unique hues
   • Measurement and analysis of complex colored patterns

   Ten PhD and five Masters projects have been completed in these areas. Four 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
   • Expert Systems in Textile Coloration
   • Modeling, Simulation & Control of Dyeing
   • Automation of Dyeing Process

   Several PhD projects have been completed in this field. The current work focuses on the development of expert 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

   Five 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 and compounds such as nano TiO₂ in fiber.

Academic Degrees

• Post-doctoral Research Associate , Leeds University, Unilever, UK., 1998
• PhD, Thesis: The Computer Control of Continuous Addition Dyeing of Cotton With Reactive Dyes, Leeds University, UK, 1997
• MSc, Dissertation: Computer Match Prediction For Screen Printed Semi-Opaque Panels, Leeds University, 1993
• BSc (Eng.) Textile Fiber, Chemistry and Engineering, IUT, 1989

Publications

Azurite blue in the Qing dynasty

Wang, R., Wang, M., & Shamey, R. (2021), COLOR RESEARCH AND APPLICATION, Vol. 1. https://doi.org/10.1002/col.22623

The effect of luminance on the perception of small color differences

Kulappurath, S. K., & Shamey, R. (2021), COLOR RESEARCH AND APPLICATION, Vol. 46, pp. 929–942. https://doi.org/10.1002/col.22637

Accurate colorimetric images using LEDs

Trussell, H. J., & Shamey, R. (2020), JOURNAL OF ELECTRONIC IMAGING, 29(4). https://doi.org/10.1117/1.JEI.29.4.043008

X-ray photoelectron spectroscopy study on the photodegradation of copolyester model compounds

Arangdad, K., Yildirim, E., Detwiler, A., Cleven, C. D., Burk, C., Shamey, R., … El-Shafei, A. (2020), JOURNAL OF APPLIED POLYMER SCIENCE. https://doi.org/10.1002/app.49661

Influence of UV stabilizers on the weathering of PETG and PCTT films

Arangdad, K., Yildirim, E., Detwiler, A., Cleven, C. D., Burk, C., Shamey, R., … El-Shafei, A. (2019), JOURNAL OF APPLIED POLYMER SCIENCE, Vol. 7, p. 48198. https://doi.org/10.1002/app.48198

Photodegradation of copolyester films: A mechanistic study

Arangdad, K., Detwiler, A., Cleven, C. D., Burk, C., Shamey, R., Pasquinelli, M. A., … El-Shafei, A. (2019), Journal of Applied Polymer Science, 136(10), 47148. https://doi.org/10.1002/APP.47148

Pretreatment effects on pigment-based textile inkjet printing - colour gamut and crockfastness properties

Ding, Y., Shamey, R., Chapman, L. P., & Freeman, H. S. (2019), Coloration Technology, 10(1), 77–86. https://doi.org/10.1111/cote.12377

Unique hue stimulus selection using Munsell color chips under different chroma levels and illumination conditions

Shamey, R., Zubair, M., & Cheema, H. (2019), JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 36(6), 983–993. https://doi.org/10.1364/JOSAA.36.000983

Determining the colorimetric attributes of multicolored materials based on a global correction and unsupervised image segmentation method

Li, Z., Xiong, N., Liu, J., Gao, W., & Shamey, R. (2018), Applied Optics, 57(26), 7482–7491. https://doi.org/10.1364/AO.57.007482

Characterization of color including temporal hue shift of a range of long-lasting phosphorescent/fluorescent (SiO_2/REC@SAOED) composites

Chen, Z., Xiong, N., Ge, M., & Shamey, R. (2017), Optical Materials Express, 7(11), 3909–3918. https://doi.org/10.1364/ome.7.003909

View All Publications

Grants

Visual Evaluation of Textiles

Patagonia(5/10/21 - 9/10/21)

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Visual Evaluation of Textiles

Sponsor: Patagonia

Start Date: 5/10/21

End Date: 9/10/21

Abstract

Booth use - Color Science Laboratory

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Digital Print Durability

Lubrizol Corporation(11/30/-1 - 12/31/17)

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Digital Print Durability

Sponsor: Lubrizol Corporation

Start Date: 11/30/-1

End Date: 12/31/17

Abstract

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.

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Characterization Of Lubrizol’s Pre-Treatment Interactions

Lubrizol Corporation(9/08/14 - 4/15/16)

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Characterization Of Lubrizol’s Pre-Treatment Interactions

Sponsor: Lubrizol Corporation

Start Date: 9/08/14

End Date: 4/15/16

Abstract

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.

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Capping and Modeling Cationized Cotton

Cotton, Inc.(1/01/13 - 12/31/16)

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Capping and Modeling Cationized Cotton

Sponsor: Cotton, Inc.

Start Date: 1/01/13

End Date: 12/31/16

Abstract

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.

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A Digital Camera Based Method for Color Quality Control of the OCP Camouflage Fabrics

US Army(9/23/13 - 3/01/19)

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A Digital Camera Based Method for Color Quality Control of the OCP Camouflage Fabrics

Sponsor: US Army

Start Date: 9/23/13

End Date: 3/01/19

Abstract

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.

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Instrumental and Visual Color Assessment of Universal Camouflage Fabric -Phase II

US Army - Soldier Systems Center (Natick)(7/01/10 - 3/31/13)

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Instrumental and Visual Color Assessment of Universal Camouflage Fabric -Phase II

Sponsor: US Army - Soldier Systems Center (Natick)

Start Date: 7/01/10

End Date: 3/31/13

Abstract

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.

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The National Textile Center: Optimizing Color Control Throughout the Supply Chain (C04-NS11)

NCSU National Textile Center Program(4/01/08 - 3/31/09)

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The National Textile Center: Optimizing Color Control Throughout the Supply Chain (C04-NS11)

Sponsor: NCSU National Textile Center Program

Start Date: 4/01/08

End Date: 3/31/09

Abstract

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).

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Development of Instrumental Color Measurement and Tolerancing of the US Army Universal Camouflage Fabric

US Army - Soldier Systems Center (Natick)(4/21/08 - 6/30/10)

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Development of Instrumental Color Measurement and Tolerancing of the US Army Universal Camouflage Fabric

Sponsor: US Army - Soldier Systems Center (Natick)

Start Date: 4/21/08

End Date: 6/30/10

Abstract

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.

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The Development of Optical Reader, Technology and Image Processing Solutions to Identify Fiber Tagging Components

US Dept. of Commerce (DOC)(7/01/06 - 10/31/08)

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The Development of Optical Reader, Technology and Image Processing Solutions to Identify Fiber Tagging Components

Sponsor: US Dept. of Commerce (DOC)

Start Date: 7/01/06

End Date: 10/31/08

Abstract

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.

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The Effect of Preparation, Dyeing and Finishing on Performance of Fiber Identification Tagging Components: Marks & Codes

US Dept. of Energy (DOE)(1/03/06 - 8/31/07)

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The Effect of Preparation, Dyeing and Finishing on Performance of Fiber Identification Tagging Components: Marks & Codes

Sponsor: US Dept. of Energy (DOE)

Start Date: 1/03/06

End Date: 8/31/07

Abstract

This project aims to investigate the effect of incorporating micro structures on fibers in terms of: -color performance -strength performance and -chemical and mechanical performance of the substrate It is also envisaged to study the effect of these processes on the performance of micro-tags and determine whether it would be possible to expose tagged yarns to severe pre-treatment, dyeing and finishing conditions while maintaining their unique fiber identification signature.

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Organizations

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

Teaching

• 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 Students

1. Muhammad Zubair
   2019, PhD, Chair, Shamey
   Development of a diagnostic expert system for the coloration of blend fibers
2. Nian Xiong
   2019, PhD,Chair: Shamey
   Quality Control of Multicolored Objects Using Imaging Systems
3. Zhenhua Luo
   2022, PhD, Chair:Shamey
   Modelling Texture
4. Jiaying Wu
   2022, PhD, Chair, Shamey
   Imaging Multicolored Objects
5. Kazi Islam
   2022, PhD, Chair, Shamey
   Development of a diagnostic expert system for the coloration of polyamide and polyolefin fibers
6. Jiajun Liu
   2019, PhD, Chairs, Chapman- Shamey
   Inkjet Printing of Textiles

Postdocs, and Visiting Scholars

1. Dr. Yu Lin, Postdoctoral Associate, 2014- Present
2. Ms. Ge Zhang, Visiting Scholar, Jiangnan University, China, 2017- 2018
3. Ms. Meiqin Wu, Visiting Scholar, Donghua University, China 2016-2018
4. Mr. Zhongjian Li, Visiting Scholar, Jiangnan University, China, 2016- 2017
5. Mr. Chen Zhe, Visiting Scholar, Jiangnan University, China, 2016- 2017
6. Dr. Lin Luo, Postdoctoral Assistant, 2015-2016
7. Dr. Juan Lin, Postdoctoral Assistant, 2013-2014
8. Ms. Shaungyan Wu, Visiting Scholar, Jiangnan University, China, 2015
9. Ms. Jiajun Liu, Visiting Scholar, Wuhan Textile University, China, 2015
10. Dr. Eunjou Yi, Visiting Scholar, Jeju National University, Korea, 2012-2013.
11. Dr. Yuzheng Lu, Visiting Scholar, Jiangnan University, China, 2012-2013.
12. Dr. Khaled El-Tahlawy, Research Associate, 2006-2008
13. Dr. Maqbool Hussain, Visiting Scholar, Pakistan, 2008- 2010
14. Ms. Merce Alsina Costabella, Visiting Scholar, Spain, Jan 2008- 2008
15. Dr. Senthilkmar Muthusamy, Visiting Scholar, India, 2006- 2007
16. Mr. Mahmud Elgammal, Visiting Scholar, National Research Center, Egypt, 2008

Undergraduate Research Projects

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

Former Graduate Students 

1. Sonali Mandal
   NCSU Postdoc, 2017, PhD, Chairs: Hauser-Shamey
   Colorimetric characteristics of cationized cotton dyed with anionic colorants
2. Sajeesh Kulappurath
   Subject matter expert, color, Apple, 2017, PhD, Chair, Shamey
   Assessment of Texture
3. Heekwang Koo
   2018, MS, Chair, Shamey
   Dermatological Application of Colorants
4. Daniel Hines
   2018, MS, Chair, Shamey
   Assessing the role of glare in colorimetric use of cameras
5. Renbo Cao
   Camera Algorithm Engineer, Apple, USA, 2015, Chair: Shamey
   Development of an instrumental technique for quality control of complex colored patterns.
6. Weethima Sawatwarakul
   Johnston Printing, Thailand, 2014, Chair: Shamey
   Development of a diagnostic expert system for coloration of protein fibers.
7. Juan Lin
   Reiko, USA, 2013, PhD, Chair: Shamey
   Factors Affecting the Perception and Measurement of Optically Brightened White Textiles.
8. Berdan Kalav
   Lecturer, Istanbul Technical University, 2012, PhD, Chairs: Shamey- Dayioglu
   Development of a diagnostic expert system for inkjet printing of cotton substrates.
9. Gang Fang
   Qualcom, USA, 2012, PhD, Co-Chairs: Shamey-Hinks
   Development of Instrumental Techniques for Color Assessment of Camouflage Patterns.
10. J. Reid Clonts
    2011, PhD, Co-Chairs: Shamey-Hinks
    Perception of Blackness and the Formulation of a Blackness Index
11. 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.
12. Changhai Xu
    Professor, Jiangnan University, Wuxi, China, 2009, PhD, Co-Chairs: Hinks-Shamey
    The Chemistry and Perception of Fluorescent White Textile Materials
13. Woo Sub Shim
    Research scientist, Korea, 2009, PhD, Co-Chairs: Shamey-Joines
    Development of a Diagnostic Expert System for the Dyeing of PolyesterSubstrates
14. Lina Maria Cardenas
    Assistant Professor, Chile, 2009, PhD, Co-Chairs: Shamey-Hinks,
    Evaluation of Variability in Visual Assessment of Small Color Differences
15. Kamran Iqbal
    Textile Research & Innovation Center, Pakistan, 2008, MS, Chair: Shamey
    Development of a visual dataset around a CIE high chroma blue color center.
16. Seung Geol Lee
    Assistant Professor, Korea, 2007, MS, Co-Chairs: Shamey-Jasper
    Assessment of Metrics in Color Spaces
17. 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
18. 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
19. 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.
20. Syed Iqbal Ahmed
    Process Engineer, UK, 2005, PhD, Co-Chairs: Shamey-Mather
    Coloration of Polypropylene: Prospects and Challenges
21. 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
22. Tanveer Hussain
    Dean of Engineering, Pakistan, 2004, PhD, Co-Chairs: Shamey-Wardman
    A Knowledge Based Expert System for the Dyeing of Cotton.