To kill the silkworms, the cocoons are dried in the sun. A variation of the process exists in which the silkworms are allowed to leave before the cocoons are soaked in boiling water to soften the silk, and then the fibers are reeled. Single-shelled, oval-shaped cocoons are collected and then boiled to extract the silk yarn. Boiling is a very important part in the manufacturing of silk, as it softens the cocoon and makes the extraction of silk easier. In conventional
sericulture, the cocoons are boiled with the larvae still inside, but if the cocoons are boiled after the larvae have left them, the silk made is then called "nonviolent silk" or "
Ahimsa silk". In China, the silks are given different names when silkworms are reared on different plants, as the diet of the silkworms has an effect on the quality of the silk. For example, silk from larvae on the wild
mulberry is called
zhe, while those on the oak
Quercus dentata produce
hu. Tussar silk is considered more textured than cultivated
Bombyx or "mulberry" silk, but it has shorter fibres, which makes it less durable. It has a dull, gold sheen. As most of the cocoons are collected from the forest, it is considered by many as a forest product. ==Production in India==