There are indigo factories, and other industries include the weaving of tussur silk and the making of coarse glass.
Gentler means of oxidation have since been found for bleaching tussur to a fairly pale ground.
The natural colour of tussur silk is a greyish fawn, and that shade it was found impossible to discharge by any of the ordinary bleaching agents, so as to obtain a basis for light and delicate dyes.
The dark colours are very difficult to bleach, but the silk itself takes dye-colours much more freely and evenly than either tussur or eria silk.
Large quantities of lac and tussur silk are gathered in the hilly tract.
Closely allied to this is the Indian tussur moth (fig.
On this account the fibres of tussur or tussore silk tend to split up into fine fibrillae under the various preparatory processes in manufacturing, and its riband structure is the cause of the glassy lustre peculiar to the woven and finished fibres.
The principal products are rice, oil-seeds, lac, tussur silk, horns, hides, wax and a little iron.
The most important of the species at the present time is the Chinese tussur or tasar worm, Antheraea pernyi (figs.
Moreover, the chemical character of the tussur silk differs from that of the mulberry silk, and the fibre has much less affinity for tinctorial substances, which it takes up unevenly, requiring a large amount of dye-stuffs.