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

TC6505	COMPUTER COLOUR MATCHING	LPTC

3003

OBJECTIVES:

• 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

UNIT I		9

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.

UNIT II		9

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

UNIT III		9

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.

UNIT IV		9

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.

UNIT V		9

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.

TOTAL : 45 PERIODS

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.

TEXT BOOKS:

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

REFERENCES

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