Abstract: Striped patterning of dyed fabric, particularly dyed denim, is obtained by impacting the fabric with a row of columnar jet streams of fluid generated from a manifold under pressure while conveying it on a support member in a machine direction through a patterning station. The orifice gauge and diameter, manifold pressure, and line speed are selected to obtain optimal striping without blurring, loss of fabric strength or durability, or excessive warp shrinkage. Preferably, the jet strip is removably interchangeable in a common hydrojet manifold for forming different kinds of striped patterns. The back side of denim fabric may be subjected to pre-treatment to cause the surface of the dyed warp side to fill in and darken with color. A strie striping effect can also be obtained using a combination of jet strips. The striped patterning station can be incorporated at any suitable point in a conventional denim finishing range.