Renzo Shamey
Ciba Professor in Color Science and Textile Chemistry
Textiles Complex 3145
Bio
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
- 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.
- 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.
- 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.
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
- Muhammad Zubair
2019, PhD, Chair, Shamey
Development of a diagnostic expert system for the coloration of blend fibers - Nian Xiong
2019, PhD,Chair: Shamey
Quality Control of Multicolored Objects Using Imaging Systems - Zhenhua Luo
2022, PhD, Chair:Shamey
Modelling Texture - Jiaying Wu
2022, PhD, Chair, Shamey
Imaging Multicolored Objects - Kazi Islam
2022, PhD, Chair, Shamey
Development of a diagnostic expert system for the coloration of polyamide and polyolefin fibers - Jiajun Liu
2019, PhD, Chairs, Chapman- Shamey
Inkjet Printing of Textiles
Postdocs, and Visiting Scholars
- Dr. Yu Lin, Postdoctoral Associate, 2014- Present
- Ms. Ge Zhang, Visiting Scholar, Jiangnan University, China, 2017- 2018
- Ms. Meiqin Wu, Visiting Scholar, Donghua University, China 2016-2018
- Mr. Zhongjian Li, Visiting Scholar, Jiangnan University, China, 2016- 2017
- Mr. Chen Zhe, Visiting Scholar, Jiangnan University, China, 2016- 2017
- Dr. Lin Luo, Postdoctoral Assistant, 2015-2016
- Dr. Juan Lin, Postdoctoral Assistant, 2013-2014
- Ms. Shaungyan Wu, Visiting Scholar, Jiangnan University, China, 2015
- Ms. Jiajun Liu, Visiting Scholar, Wuhan Textile University, China, 2015
- Dr. Eunjou Yi, Visiting Scholar, Jeju National University, Korea, 2012-2013.
- Dr. Yuzheng Lu, Visiting Scholar, Jiangnan University, China, 2012-2013.
- Dr. Khaled El-Tahlawy, Research Associate, 2006-2008
- Dr. Maqbool Hussain, Visiting Scholar, Pakistan, 2008- 2010
- Ms. Merce Alsina Costabella, Visiting Scholar, Spain, Jan 2008- 2008
- Dr. Senthilkmar Muthusamy, Visiting Scholar, India, 2006- 2007
- Mr. Mahmud Elgammal, Visiting Scholar, National Research Center, Egypt, 2008
Undergraduate Research Projects
- Haley Lindell
2017, The effect of LEDs on light fastness of conventional and cationic cotton dyed with reactive dyes - Emily Rundell
2017, Assessment of the degree of blackness of commercial colorants - Kaylin Sutton
2017, The effect of fabric color on perceived facial attractiveness of Caucasian and Chinese - Anne MacLean
2014, Threshold determination of “simultaneous contrast” and “spreading” - Haley Barkely
2013, Development of a perceptually geometric gray scale on polyester woven substrate - Chris Ohnstad
2013, Effect of certain chemical and mechanical treatments on colorimetric attributes of polyester substrate dyed with disperse dyes - Sarah Shepherd
2011, Brunescence and Its Influence on Assessment of Small Color Differences. - Troy Tomassino
2011, Development of a Sample Set around a CIE High Chroma Blue Color Center - Sarah Jane Simpson
2011, Development of a ‘gray’ hue circle. - Adam Stegall
2010, Development of a fabric based gray scale for assessment of color change - Michael Sedito
2007, Determination of unique hue based on Munsell chips - Hal Walrod
2007, Establishing a translucency index for textiles using translucent compression garments - Kevin Bullock
2006, Determining the Effect of Relative Humidity, Fabric Structure, and Finishing on Colorimetric Properties of Direct Dyed Cotton Fabrics - Karmen Cressman Miller
2005, Assessment of large color differences using DigiEye and Datacolor spectrophotometers
- Sonali Mandal
NCSU Postdoc, 2017, PhD, Chairs: Hauser-Shamey
Colorimetric characteristics of cationized cotton dyed with anionic colorants - Sajeesh Kulappurath
Subject matter expert, color, Apple, 2017, PhD, Chair, Shamey
Assessment of Texture - Heekwang Koo
2018, MS, Chair, Shamey
Dermatological Application of Colorants - Daniel Hines
2018, MS, Chair, Shamey
Assessing the role of glare in colorimetric use of cameras - Renbo Cao
Camera Algorithm Engineer, Apple, USA, 2015, Chair: Shamey
Development of an instrumental technique for quality control of complex colored patterns. - Weethima Sawatwarakul
Johnston Printing, Thailand, 2014, Chair: Shamey
Development of a diagnostic expert system for coloration of protein fibers. - Juan Lin
Reiko, USA, 2013, PhD, Chair: Shamey
Factors Affecting the Perception and Measurement of Optically Brightened White Textiles. - Berdan Kalav
Lecturer, Istanbul Technical University, 2012, PhD, Chairs: Shamey- Dayioglu
Development of a diagnostic expert system for inkjet printing of cotton substrates. - Gang Fang
Qualcom, USA, 2012, PhD, Co-Chairs: Shamey-Hinks
Development of Instrumental Techniques for Color Assessment of Camouflage Patterns. - J. Reid Clonts
2011, PhD, Co-Chairs: Shamey-Hinks
Perception of Blackness and the Formulation of a Blackness Index - 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. - Changhai Xu
Professor, Jiangnan University, Wuxi, China, 2009, PhD, Co-Chairs: Hinks-Shamey
The Chemistry and Perception of Fluorescent White Textile Materials - Woo Sub Shim
Research scientist, Korea, 2009, PhD, Co-Chairs: Shamey-Joines
Development of a Diagnostic Expert System for the Dyeing of PolyesterSubstrates - Lina Maria Cardenas
Assistant Professor, Chile, 2009, PhD, Co-Chairs: Shamey-Hinks,
Evaluation of Variability in Visual Assessment of Small Color Differences - Kamran Iqbal
Textile Research & Innovation Center, Pakistan, 2008, MS, Chair: Shamey
Development of a visual dataset around a CIE high chroma blue color center. - Seung Geol Lee
Assistant Professor, Korea, 2007, MS, Co-Chairs: Shamey-Jasper
Assessment of Metrics in Color Spaces - 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 - 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 - 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. - Syed Iqbal Ahmed
Process Engineer, UK, 2005, PhD, Co-Chairs: Shamey-Mather
Coloration of Polypropylene: Prospects and Challenges - 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 - Tanveer Hussain
Dean of Engineering, Pakistan, 2004, PhD, Co-Chairs: Shamey-Wardman
A Knowledge Based Expert System for the Dyeing of Cotton.
Area(s) of Expertise
Color Science
Dyeing and Finishing
Polymer Science
Polymer/Fiber/Textile Processing
Publications
- A novel image retrieval strategy based on transfer learning and hand-crafted features for wool fabric , EXPERT SYSTEMS WITH APPLICATIONS (2022)
- Azurite blue in the Qing dynasty , COLOR RESEARCH AND APPLICATION (2021)
- The effect of luminance on the perception of small color differences , COLOR RESEARCH AND APPLICATION (2021)
- X-ray photoelectron spectroscopy study on the photodegradation of copolyester model compounds , JOURNAL OF APPLIED POLYMER SCIENCE (2021)
- Accurate colorimetric images using LEDs , JOURNAL OF ELECTRONIC IMAGING (2020)
- Influence of UV stabilizers on the weathering of PETG and PCTT films , JOURNAL OF APPLIED POLYMER SCIENCE (2019)
- Photodegradation of copolyester films: A mechanistic study , Journal of Applied Polymer Science (2019)
- Pretreatment effects on pigment-based textile inkjet printing - colour gamut and crockfastness properties , COLORATION TECHNOLOGY (2019)
- Unique hue stimulus selection using Munsell color chips under different chroma levels and illumination conditions , JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION (2019)
- Determining the colorimetric attributes of multicolored materials based on a global correction and unsupervised image segmentation method , APPLIED OPTICS (2018)
Grants
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.
Booth use - Color Science Laboratory
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.
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.
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.
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.
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.
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.
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).
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.