Abstract: The bleaching technics have been studied by using curve estimation, or thogonal experiment and analysis of varince.The results showed that variors affe cting factors were H2O2 consistency,pH value,reaction time,starch emulsion cons i stency and reaction temperature.Meanwhile the opimum conditions for bleaching ac orm starch were:5∶1(v/w)water to starch ,1.0%H2O2 40℃ ,pH11 and 5h .On th es e conditions,the whiteness values of bleached acorn starch were in excess of tho se of corn starch.

Key words: acorn starch, bleaching technics, optimum conditions