The provided diagrams illustrate the biological life cycle of the silkworm and the subsequent industrial stages involved in manufacturing silk cloth. Overall, the silkworm's life cycle is a continuous natural process, whereas the production of silk is a linear sequence of human-controlled manufacturing steps.
The life cycle begins with a moth laying eggs. After 10 days, a silkworm larva emerges and feeds on mulberry leaves for a period of 4 to 6 weeks. Following this growth phase, the larva produces a silk thread to construct a cocoon, a process that takes between 3 and 8 days. Finally, after 16 days within the cocoon, a new moth emerges, completing the cycle.
In the production of silk cloth, the process commences with the selection of cocoons, which are then boiled in water. Once boiled, the silk thread is unwound, yielding between 300 and 900 metres of material. This thread is subsequently twisted and dyed to achieve the desired colour. The final stage involves weaving the prepared threads into finished silk cloth. Both processes demonstrate a clear progression from raw biological material to a refined commercial product.