Here is the stage by stage silk production step. There is a regular way follows for silk production. Here is a brief description of silk production.
Stage by Stage Silk Production
Silk worms take advantage of mulberry leaves and so for rearing them, the growing of mulberry trees is that the initial essential step. These area unit full-grown by the agriculturists.
Silk worms have a brief lifetime of solely concerning 2 months and through that these tolerate the subsequent four stages
1. Egg 2.worm or larvae 3. Pupa and 4. moths.
Silk worms area unit has to put eggs on specially ready paper for this purpose. Eggs area unit need to collect and unbroken at coldness till the hatched of it. At this stage the worm desires special care bamboo trays with straw mats area unit provided for them. once the caterpillar is concerning eight weeks previous it secretes a viscous fluid from 2 glands on its head that oozes out from the common gap close to its mouth. At constant time it conjointly secretes a viscous quite fluid referred to as ‘sericin’ that passes through constant gap. The fibroin gets hardened once exposed to air. The silk worm spins around itself to make a cocoon. The cocoon contains 2000 to 4000 yards of reelable silk. For separating the silk thread from the cocoons they have to immerse in predicament.
The method of unreeling the filament from the cocoon is reeling. The care and ability within the reeling operation prevents defects within the raw silk. Because the filament of single cocoon is simply too fine for business use. Here 3 to 10 strands area unit sometimes reeled at a time to supply the specified diameter of raw silk thread. many cocoons area unit placed in predicament to melt the gum and also the surfaces area unit brushed gently to seek out the ends the filaments. These ends area unit collected, rib through a guide and wound on to a wheel referred to as ‘reel’.
Because the fibres area unit need to combine and force on to the reel, twist will insert to carry the filaments along. This can be referred to as throwing and also the ensuing yarn is ‘thrown yarn’. This yarn later goes to weaving or knitting trade primarily based the kind of yarn made.
Short ends of silk fibres from the outer and inner edges of the cocoons and from broken cocoons. And spun into yarns in a very manner the same as that used for cotton. This is spun silk.
Sericin or clog up to half-hour of the load of the silk fibre. It’s not sometimes removed till when the fabric is woven as a result of is warp filler that protects the yarns from mechanical injury throughout weaving. Sericin remains on the fibre throughout reeling and throwing before finishing, the gum is removed by boiling the material in soap and water. The presence of gum and sericin will increase the tendency for the silk to water spots on materials once smooth.
Bleaching is the process when silk need to treat with oxides.
Silk has nice affinity for the dyes. Acid dyes turn out sensible shades on silk.
Printing on silk varies by any technique like roller printing, Screen printing or block printing. Hence, silks area unit sometimes dried and so written.
Silk materials need only a few finishes as a result of they need natural lustre, softness and drapability.
Weighting of silk
Once silk is to get rid of the surplus of natural gum or sericin it looses weight. This loss of weight has to replace through treatment by metals like tin, metallic element etc in water solutions. These need to remove. Thereafter, weighted silk isn’t sturdy as a result of daylight and perspiration weakens fibres. Significant coefficient causes silk to crack.