sericulture step by step silk production process in soufli evros greece, white silk cocoon on the leaves

soufli evros greece china delicate fabric wrinkle traditional butterfly silkworm organic fiber manufacturing nature leaf pure careful thread cocoon worm closeup background silk fluffy insect soft raw material white mulberry natural texture moth textile green production industry industrial capsule caterpillar threaded rope brow detail clothing asia animal growth farming sericulture step process leaves