TT2022 SILK YARN TECHNOLOGY ANNA UNIVERSITY SYLLABUS

UNIT I 9

Overview of the silk industry and the features of silk, Present day silk industry, Varieties

of silk. Mulberry leaf varieties and production, Biology of the silkworm, Silkworm rearing,

Harvesting. Characteristics of the cocoon – Physical characteristics, Composition of the

cocoon, Properties of silk. Cocoon quality, Factors influencing cocoon quality,

Classification of cocoons, Cocoon testing and grading.

UNIT II 9

Cocoon drying, Storage and Sorting: Objective of cocoon drying, Mechanism of cocoon

drying, and Various methods of stifling/drying, Degree of drying, Types of drying

machines and methods, Effects of drying conditions on reeling results. Cocoon storage,

Sorting of cocoons. Cocoon Cooking and Raw Silk Reeling: Introduction, Cocoon

cooking methods, Degree of cocoon cooking, Adjustments to cooking conditions, Effects

of cocoon cooking conditions on reeling result. Various silk reeling devices, Methods of

silk reeling, Quality control during raw silk reeling.

UNIT III 9

Re-reeling and Finishing: Re-reeling

raw silk, Re-reeling efficiency, Silk end tying and skein lacing, Booking and packing,

Storage of silk. Factory Planning: Annual requirement of cocoons, Equipment for

installation, Location and space, Quality and quantity of filature water, Selection of

proper machinery.

, Re-reeling machine and apparatus, How to re-reel

UNIT IV 9

Utilization of By-products: Introduction, Dupion silk reeling, Reeling of non-mulberry

cocoons, Manufacture of spun silk – Degumming, Opening-up, Finishing. Count of spun

silk yarn, wild silk yarn.

UNIT V 9

Silk Throwing – Soaking, Hyrdroextracting, Drying, Winding, Doubling, Primary and

Secondary Twisting, Tram, Organdine, Crepe Twist. Warping, Weaving – Handloom,

Powerloom, Shuttleless Weaving. Degumming and dyeing of yarn and fabrics. Types of

silk fabrics

TEXT BOOK

1. T.N.Sonwalkar, “Handbook of Silk Technology”, Wiley Eastern Ltd., New Delhi, 1993.

2. S.B. Dandin, J. Jayaswal and K. Giridhar (Edrs.), Handbook of Sericulture

Technologies, Central Silk Board, Bangalore, 2001.