Three domains correlated with the process and the mechanism involved into seedlac,a natural high molecule polymer,were carried out in this thesis Firstly,the catalytic hydrodechlorination added with Pd and Ni for removal compact chlorine entered into the molecule structure of seedlac while bleached with sodium hypochlorite was investigated.

Aleuritic is an important raw material in the synthesis of civetone or dihydrocivetone in perfumery industry An extraction process of aleuritic acid from the seedlac was developed.

the composition and structure of seedlac are introduced in this paper,the usage,properties and specification,and the manufacture process of the series products of seedalc are also introduced.

Application of Shellac Resin in Fabricating Optical Polishing Pills;

Used as raw material, shellac was immersed with distilled water and lac dye was extracted.

The research is made on dewaxing shellac by centrifugal subside and refining shellac-wax by Carbon tetrachloride extraction.

Study on the phenol-formaldehyde resin adhesive modified with lac;

Identification of Different Lac with Infrared Spectrum;

The Basic Compostition of Domestic Lac;

Extraction of aleuritic acid by saponification aided with ultrasonic wave;

Aleuritic is an important raw material in the synthesis of civetone or dihydrocivetone in perfumery industry An extraction process of aleuritic acid from the seedlac was developed.

The composition and process of lac wax,lac dye,and aleuritic acid are introduced as an important part in the thesis,the trend of the seedlac product development and design,such as the mechanism of bleaching,the technique of bleaching,shellac dechlorination,new applications of seedlac etc.