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Reddy T.,PESIT | Roy S.,PESIT | Prakash Y.,CSTRI | Somashekarappa H.,Vv Puram Science College | And 3 more authors.
Fibers and Polymers | Year: 2011

Mulberry fiber (Bivoltine) and non-mulberry fiber (Tassar) were subjected to stress-strain studies and the corresponding samples were examined using wide angle X-ray scattering studies. Here we have two different characteristic stress-strain curves and this has been correlated with changes in crystallite shape ellipsoids in all the fibers. Exclusive crystal structure studies of Tassar fibers show interesting feature of transformation from antiparallel chains to parallel chains. © 2011 The Korean Fiber Society and Springer Netherlands.

Radhalakshmi Y.C.,CSTRI | Kariappa,CSTRI | Siddaraju G.N.,JSS Women College | Gopalkrishna R.,Indian National Institute of Engineering | Somashekar R.,University of Mysore
AIP Conference Proceedings | Year: 2012

Recently Central Sericulture Research and Training Institute, Mysore developed many improved cross breeds and bivoltine hybrids. Newly developed cross breeds recorded fibre characteristics which are significantly superior over existing control hybrids. This aspect has been investigated using X-ray diffraction technique. We have employed line profile analysis to compute microstructural parameters. These parameters are compared with physical parameters of newly developed cross breed silk fibers for a better understanding of structure-property relation in these samples. © 2012 American Institute of Physics.

Sinha R.K.,Indian Silk | Hipparagi S.A.,CSTRI | Ramesha M.N.,Indian Silk
Indian Silk | Year: 2014

Isabelle Arciero-Moheir, a silk visual artist enthusiast from France has created a very interesting and appealing visual lexicon in silk-be it painting on silk, dress with silk cocoons, perfumed paper made of silk fabrics. She believes in making peace through art, throughoutthe world-sharing the joy ofcreation. Speaking to Indian Silk, she shares her passion for silk, her different projects, and experiences with the Lambani women groups appreciating their skill and taste.

Sinha R.K.,Indian Silk | Hipparagi S.A.,CSTRI
Indian Silk | Year: 2010

A study was conducted to examine initiatives in different segments of the silk industry at the Silk Mark Expo, 2009 at Bangalore. The conventional zari sarees of Southern India have taken to new look in terms of color combination, usage of coarse material like tasar or jute, and zari for extra warp and wefts designs. All over designs with leaf and geometrical motifs have given break to conventional look of sarees. Unique Kantha work, which means surface ornamentation of Kolkata using needle has further refined these days by using finer thread for introducing sharp designs and extensively using small motifs. Self-design like rib structures have been created in thans using fine and coarse yarn by varying the counts of the weft yarn. Eri spun had been used as warp and filament tasar as weft which is quite unusual.

Chattopadhyay D.,Regional Silk Technological Research Station | Munshi R.,Regional Silk Technological Research Station | Padaki N.V.,Regional Silk Technological Research Station | Mishra S.N.,Regional Silk Technological Research Station | Roy S.,CSTRI
Indian Silk | Year: 2010

The cost of production and quality level that can be achieved for manufacturing eri silk yarn by using amber charka technique in India is discussed. The two methods are followed for eri spinning using amber charka after degumming and drying process that includes without carding and with carding. For one kg of eri cocoon used for the spinning process, degumming loss is 120g, waste generated in the spinning process is 50g and invisible losses are 30g. The total cost of eri silk yarn for 800 g is Rs 688, and the cost per kg of yarn works out to Rs 860. The modifications that are required in order to obtain better output and quality of eri spun silk yarns includes the use of long staple drafting system in amber charka and the use of either pedal operating or motor driving system in amber charka. The use of pedal operating or motor driving system help the operator to piece the yarn during end break without stopping the machine that improves the production and the daily wages of artisans.

Reddy A.,CSTRI | Mahadevaiah B.M.,CSTRI
Indian Silk | Year: 2012

The Central Silk Board under Catalytic Development Programmes, since the last two Five Year Plans, has implemented a good number of developmental schemes supporting various activities of sericulture and silk industry, that proved to be a springboard for the growth of the industry. The authors in a survey conducted on the socio-economic conditions of wage earners in reeling sector (second in the series, first part appeared in Indian Silk, June 2011) have come out with the impact of the CDP schemes in this segment.

Shambhu Katey R.,CSTRI | Das S.,CSTRI | Herakal B.C.,CSTRI | Shiva Prakash A.V.,GSKSJTI
Indian Silk | Year: 2010

Silk industry is predominantly traditional in nature, and most of the silk is degummed and dyed in open vessels. The acid dyes are the most widely used class of dyestuff for silk, combining brilliancy of shade and good all-round fastness properties with simplicity of application. Industry exploits color in many ways to attract consumer's interest towards merchandise. Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) values are of importance in reflecting the pollution load on environment. It is observed that BOD and COD values of simultaneous process are higher than separate process, and have greater impact on environmental pollution. The economics of both the processes was worked out after taking into account the cost of different inputs like water, chemicals and fuel. Though the simultaneous process of degumming and dyeing works out cheaper, its advantages compensate by better light fastness, higher shade depth and less load of effluent on environmental pollution achieved in separate process.

Divakara S.,University of Mysore | Reddy T.,CSTRI | Subrata R.O.Y.,CSTRI | Siddaraju G.N.,University of Mysore | Somashekar R.,University of Mysore
Journal of Polymer Materials | Year: 2010

The behaviour of silk fibers in dry and wet conditions has been investigated using WAXS technique. In wet condition of fibers, there is a possibility of modification in configuration of Ala-Gly-Ser Residues, which results in different polymer network. This aspect has been quantified in terms of microstructural parameters like crystallite size, lattice strain, stacking and twin faults by using indigenously developed line profile analysis and whole powder pattern fitting technique. © MD Publications Pvt. Ltd.

Naik S.V.,Silk Conditioning and Testing House | Malali K.,Silk Conditioning and Testing House | Naik P.,Silk Conditioning and Testing House | Roy S.,CSTRI | Somashekar T.H.,CSTRI
Man-Made Textiles in India | Year: 2010

To expand use of silk in diversified products, new silk yarns with new characteristics have to be developed. Production of blend silk yarns during silk reeling process is one of the attempts in this regard. The mechanism and gadgets required for production of blend silk yarns have been developed and fixed to CSTRI multi-end reeling machine. The blend silk yarns using polyester, viscose, nylon and cotton yarns in the core were developed and silk yarns equivalent in denier to each of these yarns were also developed for comparison. From the yarn characteristics it is observed that uniformity of blend silk yarns is significantly better than the corresponding silk x silk yarns. Strength of corresponding silk x silk yarns has been found to be significantly better than silk x polyester, silk x viscose and silk x cotton cover yarns. It is also observed that, elongation of silk x viscose yarn is significantly better than that of silk x silk yarn, whereas elongation of silk x silk yarn is significantly better than that of silk x cotton yarns. Quality characteristics of blend silk yarns indicate that these silk yarns can be utilized for the manufacture of innerwear, dress materials and furnishings with distinct characteristics.

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