Abstract: ：The manufacture processing of tea green pigment — sodium-zinc chlorophyllin (TGP_-2) was studied by using expectant function approach for simultaneous optimization of several variable levels. The results showed that the effect of heating time was the most noticeable, then the concentration of ZnSO₄,temperature, and pH successively. The optimum of preparation process was 3.0 pH, 72.8℃, with 21.5% of ZnSO₄ concentration for 89.6βmin, and the efficiency of yield could reach 0.69%.

Key words: tea green pigment, sodium-zinc chlorophyllin, ironing, manufacture processing