... for super bright polyester chemical fiber. Barium Sulfate for Chemical FiberItemIndexAppearanceWhite, impurity-freeBarium sulfate (by dry basis) % ≥98.0L ... 3Iron (Fe) ppm ≤8Oil absorption g/100g13~20Features: Barium sulfate for chemical fiber, specially developed for super bright polyester chemical ... , and truly becoming a substitute of foreign barium sulfate for chemical fiber, and has got the actual ...