Weft ikat uses resist-dye for the weft alone. The variance in colour of the weft means precisely delineated patterns are more difficult to weave.
As the weft is commonly a continuous strand aberrations or variation in colouration are cumulative. Weft ikat are commonly employed where pattern precision is of less aesthetic concern than the overall resultant fabric. Some patterns become transformed by the weaving process into irregular and erratic designs. Guatemalan ikat is well-noted for its beautiful "blurs" in colouration.
The precise images of Japanese kasuri ikat are fine examples of weft ikat.