TC6505 - COMPUTER COLOUR MATCHING (Syllabus) 2013-regulation Anna University


• To enable the students to understand various colour theories
• To simulate shade matching and predict recipes using CCM
• To discuss more about responsibilities of each department in garment industry and their working procedure

Colour perception, theories of colour vision, colour measurement. Reflectance Spectrophotometer-- Basic components of Reflectance Spectrophotometer-Types of Spectrophotometer- Spectrophotometer performance Parameter-Spectrophotometer selection parameter-precauctions for Spectrophotometer-Calibration of spectrophotometer-main features of morden spectrophotometer-New commercial spectrophotometer--Tristimulus colorimeters-Gloss meters- multi-angle spectrophotometer-Features of commercial multi-angle spectrophotometer-commercial multi-angle spctrophotometer-multi-angle vewing booth for visual assessment-new development muilti -angle spectrophotometers-non-contact spectrophotometers -reflactance curves.

The CIE color specifications – Computation of tristimulus values-XYZ from reflectance values – The CIE standard illuminants – The CIE standard observer – computation of tristimulus values – chromaticity coordinates & chromaticity diagram – Features of CIE system – Limitations of the CIE systems – The CIELAB color specification – CICLAB color space – CIELCH color space – Kubelka – Munk relation & concentration of colorant – Features of kubelka-munk function – Modification to K-M theory,Four-Flux theory & Multi-Flux theory – Color difference equations & color difference calculations – color difference & grey scale rating – Metamerism & metameric index – Types of metamerism – Light booth for visual assessment of metamerism – color constancy & color inconstancy index – Pass/Fail – Shade short program – Relative dye strength analysis program – Whiteness / Yellowness index – yellowness index – Contrast ratio & opacity calculations – Reflectance of translucent samples – color matching programs – K-S data generation – color matching – Ratch correction – statistical analysis in QA & color matching applications

Sample preparation, presentation & measurement – Selection of spectrophotometer - Sample preparation & presentation – Textiles & dye application .The basic laboratory equipments for successful handling of computer color matching system – The CIE color specifications in textiles applications - The CIE color specifications of dyes – Change in Hue with increase in concentration – Chromaticity coordinates & chromaticity diagram – Dye gamut mapping – Setting tolerances – Studying the compatibility of dyes – Color difference assessment – Color difference of self colors – colour difference using different color difference equations.

colour difference & metamerism – Metameric index &number of dyes per combination – Color inconstancy index(CII) – The Color inconstancy index of dyes – The CII & the concentration of a dye – The CII of mixtures of dyes – Fastness rating – Pass/Fail – Specifying tolerances –Shade sort – Shade sort using 555 method – Advanced shade sort methods – Color strength analysis – Relative strength methods – linear region of dyes – color strength & residual color difference – color strength of navy blue & black – color strength of dyes with the same color index number.

color strength of fluorescent dyes & residual color difference – whiteness index & yellowness index - whiteness index of various natural & man-made fibres - whiteness index using different WI equations –whiteness of OBA treated samples – whiteness & tint of OBA – Whiteness of OBA with tinting agent – Whiteness & aperture size of spectrophotometer – Whiteness on different spectrophotometers with PXF light source – Whiteness measurement with & without UV filter – Whiteness measurement of UV-filters with different cut-off wavelength – Whiteness index & the whiteness of basic substrate – effect of washing on whiteness – whiteness of white substrates for medicalware & hospitalware – calculating relative strength of OBA – Soil removal evaluation of detergents - yellowness index of white & near – white textile substrates –Studies in dye behaviour – Dye build-up properties - Linear and non linear behavior of dye – fastness properties –compatability of dye standard depth and its calculation.


OUTCOMES: Upon completion of the course, the students will be able to
• Understand colour theories, different measures of colour and specifications
• Predict recipes using CCM which would enable them to provide job opportunity in the field of testing and to carry out research.

1. Johnson,A, ‘The Theory of Colouration of Textiles’, SDC 2nd Edition,1998
2. Peters.A.T and Freeman,H.S ‘Analytical Chemistry of Synthetic Colorants’, Blackie, ISBN 0751402087.1991

1. Peters.A.T and Freeman,H.S ‘Physico – Chemical Principles of Colour Chemistry’, Blackie, ISBN :0751402109.1995
2. Colur Technology Tools,Techniques & Applications


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