The skin of the maize grain is corn fiber. It is expelled in wet condition during the process of steeping after separating fat, oil, protein, etc from the grain. Wet Bran or wet fiber is used as a cattle feed as it has some residual properties of Corn Oil Cakes.
This fiber, when dried by a dryer or sun dried, is dry fiber. Due to its property, dry fiber is used in the manufacturing of Oil cakes.