One way of making weft ikat seen here is to stretch out a guide thread and paint or stencil the design for the weft on it. Then it would be stretched out along beside a long bundle of yarns needed for the weft for the entire warp. Where the dark pattern hits the bundle is where the bundle would be tied to resist the dye. I would die to have one of these weft frames with a weft pattern on it.
This shows the areas on the weft where the pattern was to be tied to resist the dye. (The resisted areas resisted the dye and remained white.) Here the wefts are woven on a traditional dark warp.
Here the same wefts woven on a white warp.
Remember this tote bag from a previous post? The egret could have been put on a frame like in the first photo and that pattern thread used to mark the weft for tying and dyeing. Note that white wefts were woven on the dark warp for the light area where there was no pattern.
Remember this pocket I made from an earlier post? Did you see the horses?
Here are the horses! The stencil for the horses was made by the creative young weaver in the previous post. Note that she chose to use a white warp with the stencil for the ikat weft. Her name is Butsusaka Kanako.