More about Tussar or Tussah or Tassar

Looking for Tussar, I came across several other interesting features. Some of these are as follows:

1. China exports two types of Tussar Silks: 33/37 D Water reeled and 70 D Dry Reeled Silk. I am just wondering if the "China" that is 50/70 quality that we use in India is dry reeled always.

2. There are 7 grades of quality of Tussar Exported by China, 4A, 3A, 2A, A, B, C and Off grade.


3. The standard moisture regain of Tussar Silk is 10% and density is 1.58 to 1.63 gms/cm3.


4. Elongation at break of water reeled tussar is 23% and dry reeled tussar is 16%.


5. China tussar is different from Indian ( Tropical ) tussar due to the fact the China Tussar the species of the worm is different and fed on "Oak Leaves" ( Also done in Himalyan Regions of the country). Whereas in India it is fed on "Arjun" and "Aasan" leaves. 


6. 8 is the usual number of cocoon filaments to form a single thread. The normal size of the thread produced is 30-35 deniers.


7.Tussar silk is the primary kind in the silk which lustrous,bright,soft handfeel,it has highest wear resistance in the natural faric. The Acid & Alkali Resistance of tussah silk is better than mulberry silk.


However I could not find out how they do dry reeling of tussar. Would require your inputs. 


And yes, I found the Tussar process practiced in Bihar, Bhagalpur. You can click here to find out more.

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Process Control in Textile Chemical Processing

ABS Laboratories is mainly into manufacturing of Sulphur Dyes, Direct Dyes and  Reactive Dyes (HE class) for coloration of textile products. 


What is more important that on their website is a wealth of useful information for textile professional.


You can get characteristic shades of Sulphur, Direct and Reactive Dyes. If you also want to know how to apply sulphur dyes, click here to find out. 


And best of all they have an amazing document on the process control of Textile Chemical Processing. 

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A review of Cotton Spinning- Process Control Perspective

Update Note: This article was originally written in 2011. One of the external reference links used at that time is no longer active. I have retained the article because the broad ideas related to cotton spinning and process control may still be useful to students and textile professionals. I may update this article with fresh references in the future.

Dyeing of Ikat Orissa Yarn with Vat and Napthol Colors

Dyeing of Ikat Orissa Yarn with Vat and Napthol Colors

Vat Colouring of Handloom yarn:

For vat colouring of one muda ( equivalent to 10 hank/ phand locally or 8400 yards) of handloom yarn 2 gms of colour, 8 gms of caustic soda and 8 gms of hydrogen sulphide is added in 1.5 litres of hot water. The yarn is then dipped in the hot water and stirred. The yarn is then drained out of the container and allowed to cool down. It is then washed in cold water and then sun dried.

Napthal Colouring of Handloom yarn:

For napthal colouring of one muda  of handloom yarn 4 gms of caustic soda and 4 gms of napthal is added in 1.5 litres of water and boiled. The yarn is then dipped in the hot water and stirred. Subsequently the yarn is drained out of the container and allowed to cool down. 4 gms of colour is then added in another container having 1.5 litres of water and stirred. Now the napthal drained yarn is dipped in this container. Water is then drained out of the coloured yarn and sun dried.

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