Thus , the primary photodegradation of cellulose acetate is considered insignificant to the total degradation process , since cellulose acetate .
Photodegradation 's impurities absorb light at shorter wavelengths .
Thus , the primary photodegradation of cellulose acetate is considered insignificant to the total degradation process , since cellulose acetate and its impurities absorb light at shorter wavelengths .