نتایح جستجو

  1. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    the silk thread is rolled on a reel
  2. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    it begins to unwind, forming an extraordinarily long thread of great strength yet as delicate as a spider’s web a spatula removes the outside layers of the cocoon, then, having found the end of the single cocoons
  3. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    most steps of traditional silk making in thailand’s villages in the north-east are done by women and take place in open areas. in the reeling process, a special wooden device is used to locate the end of the filament, after which it must be carefully unwound, a process that not only requires...
  4. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    the fresh and fragile cocoons are ready to be scooped into the reeling pot. each cocoon consists of many yards of tightly woven silk thread
  5. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    step 2: thread extraction the story of silk began more than four thousand years ago in the court of china’s first emperor. it is said that a young concubine named lei tsu, by way of experiment, has discovered the ‘finest natural textile thread known to man’. the art of waving silk, first...
  6. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    the worms have spun thousands of gossamer little cocoons the satisfactory cocoons are now in a clean tray. see the lustrous, golden color. care must be taken not to damage them when removing from the old trays. the entire process, from silkworm egg to complete cocoon, takes about twenty-five...
  7. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    after some 36 hours, the worms are sealed within a yellow cocoon, embarked on the process of metamorphosing into a moth
  8. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    again, worms are protected from harmful flying insects by wrapping the trays with fine nets. there seems to be always a few dead silkworms in each tray. while a dramatic increase in the mortality rate is reason for concern, silkworms are insects, and farmers can expect that less than half of the...
  9. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    at that stage they are removed from their feeding trays the ‘bombyx mori’ worms are now inserted in a specially woven circular bamboo scaffolding, which will make the cocoons more uniform in shape and easier to collect
  10. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    at the beginning every few days, the worms need to be moved to a clean tray with fresh food. members of the farmer’s household must spend a growing amount of time to their bamboo trays, also because silkworms produce quite a lot of excrement and cleaning the trays is not a job for the...
  11. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    despite revolutionary changes in methods of manufacture, the ultimate basis of silk remains the tiny, inconspicuous-looking silkworm and the most critical period in silk production comes during the silkworm’s brief life span of around 20/24 days. nearly all silkworm-producing moths belong to the...
  12. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    the newly born silkworm only eats mulberry leaves. a silk farmer must have a ready supply of mulberry leaves and fruits close at hand, even one missed feeding can kill the sericulture. there are times of the year when the mulberry leaves are not around... continued food shortages can decrease...
  13. Phyto

    پرورش نوغان (کرم ابریشم) و استحصال ابریشم ...

    step 1: raising silkworms and harvesting cocoons silkworms are really not worms at all. silk worms are the larvae of ‘bombyx mori’ moths and silkworms are actually domesticated insects. native to china, the silkworm does not longer exist in the wild, after so many centuries of inbreeding the...
  14. Phyto

    داستان ابریشم

  15. Phyto

    داستان ابریشم

  16. Phyto

    داستان ابریشم

  17. Phyto

    داستان ابریشم

  18. Phyto

    داستان ابریشم

  19. Phyto

    داستان ابریشم

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