Since rayon and acetate are both developed from regenerated cellulose, they have similar characteristics whereas both are sensitive to high pH’s at elevated temperatures.  During scouring and bleaching of rayon/acetate it is important to stay below a pH of 9.5 where 9.0 is recommended.  The processing temperature for acetate is lower than rayon and is in the range of 150-165°F(66-74°C).  In order to minimize the risk of saponification of the acetate into its original cellulose form, it is wise to perform any processing procedures at these lower temperatures.  Refer to the   scouring and bleaching procedures for the individual fibers of rayon and acetate.