3905 9910 00

3905991000

Poly(vinyl formal), in one of the forms mentioned in note|6(b) to this chapter, of a molecular weight of 10|000|or more but not exceeding 40|000|and containing by weight: -|9,5|% or more but not more than 13|% of acetyl groups evaluated as vinyl acetate and -|5|% or more but not more than 6,5|% of hydroxy groups evaluated as vinyl alcohol