I have been noticing a small spot of color in the ‘wrong’ place in sashes, and have finally put two and two together to see a rather elegant solution to a common problem:
The arrow and lightning pattern requires the weaver to count and regularly change the weft across the face of the sash. A common error is a mis-counting, or just plain forgetting to change the weft.
Here I notice I’ve woven too far. I am wanting to have a green thread to switch with the pale colored thread. The red should have been switched away 12 threads back. I could un-weave these last 12 threads … or …
Change of weft, red for pale, and then bring that red thread back to where it belongs.
The red and green threads have traded places, and you may now resume weaving as if nothing has happened.
You now have a green thread for the change of weft with the pale thread. Carry on weaving normally.
Note that you will have to be vigilant on the very next row:
Make sure that the red thread is back in place for the next row. It may have drifted back toward the green thread that replaced it.
The only telltale of this misadventure will be a tiny red ‘blip’ seen in between the green and pale lightnings, and very slight extra thickness where three threads passed as weft instead of only one.
If this red blip bothers you, then repeat it two more times. According to accepted theory, when something happens three times in a row, then it’s a design element. Tell people you did it on purpose … make it into a signature.