Dyeing of Natural Fibres detail TNDTE Diploma syllabus for Textile Processing (TP), M scheme is extracted from TNDTE official website and presented for diploma students. The course code (36133), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.
For all other textile processing 3rd sem syllabus for diploma m scheme tndte you can visit Textile Processing 3rd Sem Syllabus for Diploma M Scheme TNDTE Subjects. The detail syllabus for dyeing of natural fibres is as follows.
Rationale:
Dyeing is an important process in the textile processing sequence which imparts uniform color in the textile material. Dyeing depends on the affinity of dyes
for the fibres, conditions of dyeing and auxiliaries used for dyeing of natural fibres. Direct dyes, Azoic dyes , Natural dyes, Reactive dyes, Vat, Solubilised Vat dyes & Sulphur dyes are used for cotton and Acid, Basic dyes for silk, wool material using various techniques and machines.
The content of the syllabus for this subject is aimed to fulfill the requirements of dyeing industries in addition to the theoretical knowledge behind the chemistry of dyeing of the above classes of dyes with natural fibres.
Objectives:
- To know about the basic theory and application concepts of dyeing.
- To have an idea about the role and functions of dyeing auxiliaries.
- To know how direct dyes are applied on cellulosic material.
- To know how azoic dyes are applied on cellulosic material.
- To know how Natural dyes are applied on cellulosic material
- To know how various types of Reactive dyes are applied on cellulosic material.
- To know how Vat, & Sulphur dyes are applied on cellulosic material.
- To know how the Solubilised Vat dyes are applied on cellulosic material.
- To know how Acid & Basic dyes are applied on Wool and Silk materials.
- To know how pigments are applied on cellulosic materials.
- To know how Acid & Basic dyes are applied on Wool and Silk materials.
- To have an idea of construction and working of woven & knitted fabric dyeing machines
Detailed Content:
Unit I
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Unit II
Direct Dyes, Azoic Dyes And Natural Dyes
Direct Dyes – Classification – Properties – Mechanism of dyeing -Application of direct dyes on cotton – after treatments -Advantages and disadvantages of direct dyes – Stripping of direct dyed material.
Azoic dyes – Properties of Naphthols and Fast bases -Application of naphthol and fast base on cotton. Advantages and disadvantages of azoic dyes.
Natural dyes- definition – properties – Application of natural dyes on cotton.
Unit III
Reactive Dyes
Reactive dyes – Classification – Properties – Mechanism of dyeing (Nucleophilic substitution & Nucleophilic Addition Reaction) Application methods – Exhaust dyeing (cold brand, HE & ME dyes), Semi continuous (vinyl sulphone dyes) and Continuous method (e-control process) – Advantages and Disadvantages of
reactive dyes – Dyeing of silk with reactive dyes – Stripping of reactive dyed material. Problem with hydrolyzed reactive dyes & solution.
Unit IV
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Unit V
Acid, Basic Dyes And Dyeing Machines
Acid dyes – Classification – Properties – Mechanism of dyeing -Dyeing of silk with acid – Dyeing of wool with acid dyes -Advantages and Disadvantages of acid dyes.
Basic dye – Properties – Dyeing of silk with basic dyes – Dyeing of wool with basic dyes – Advantages and Disadvantages of basic dyes Brief study on Pigment dyeing: Pad – dry – cure and Exhaust method.
Dyeing Machine: Woven Fabric Dyeing – Working of Jigger, Working of Soft Flow dyeing machine.
Text Books:
- Asim kumar roy choudhury Textile preparation and dyeing Oxford & IBH publishing Company Pvt. Ltd. New Delhi 2006
- Shenai V.A Technology of Dyeing Technology of Textile Processing, Vol. I Sevak Publications, 306, Sri Hanuman Industrial Estate, GC Ambedkar Road, Wadala, Bombay 400 031 1980
- Chakravarthy RR and Trivedi S.S Technology of Bleaching and Dyeing of Textile Fibres Vo Mahajan Book Publishers, Supermarket Basement, Near Nataraj Cinema, Ashram Road, Ahmedabad 380 009 1979
- John shore Cellulosic dyeing SDC Publications, UK 1995
Reference Books:
For complete syllabus and results, class timetable and more pls download iStudy Syllabus App. It’s a lightweight, easy to use, no images, no pdfs platform to make students life easier.
For detail syllabus of all other subjects of BE Textile Processing, M scheme do visit Textile Processing 3rd Sem syllabus for M scheme.
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