Supplementary warp technique (Ley pallay) Pacay LeyCajas Ley Ley pallay has a background warp, usually of a light color, and a set of thicker warps of a darker color that create the design by floating on one face of the fabric. Sometimes two pattern colors are used (called ley of three colors). Weaving Techniques Complementary warp techniqueSupplementary warp technique (Ley pallay)Weft-faced weavesOther techniques ← Complementary warp technique Weft-faced weaves → Supplementary warp technique (Ley pallay)