Exploitation of natural red silk

In order to avoid the effect of chemical dyes on the human body and reduce water pollution caused by printing and dyeing,this article explores a production method of colorful silk by adding pigment into the silkworm food.After feeding adult silkworms with mulberry that has been evenly sprayed with food additives containing red pigment,investigation is conducted on the color of cocoon,quality of cocoon filament,and the combination of pigment and protein.The results show that shade of cocoon and reeling silk are all even and bright.Color depth in the cocoon is directly proportional to the concentration of additional pigment.With respect to cocoon color,no difference occurs to the male or female when fed with the same concentrated pigment.Within the range of certain concentrations,the red pigment has little effect on the quality of cocoon and cocoon filament.The red pigment has a fast bond with protein.Color of sericin,fibroin,pupa,moth and egg shell are all red.