The layer double hydroxide (LDH) synthesis principle was applied to develop the method of treating dyeing wastewater by synthesizing LDH in situ, and the feasibility of the method was experimented.

The pupa protein fiber is a new style regenerative protein fiber, is dyed with double-group reactive dyes, and have carried on some optimization tests to the craft of dyeing.

The pupa protein fiber, a blended spun fiber with viscose and pupa protein, is dyed with double- group reactive dyes, and the dyeing conditions are tested emphatically.