Lessons learned

This sash is certainly teaching me alot.
It has been my custom in sprang to work several rows, placing sticks in each the shed, completing several rows before getting up and moving all those sheds, one after another, into the mirror-image position.
This sash, as with many historic sashes from the 1700s, was created using more than one very fine thread. I’ve got multiple strands. Just like embroidery floss that comes in 6 strands, that’s how these sashes are made: multiple strands, unplied. Now the problem happens when I am not 100% accurate, and wrongly group a thread. When I go to push it into the mirror-image section, that mis-grouping causes a snag. Mostly I notice that it’s really hard pushing, check the culprit thread, and find the mistake. Sometimes, however, it’s only in examining the fresh row on the mirror image.

Thread grouping error The error shows up as an imperfection in the mirror image.

I am finding that it’s best to catch these errors right away, like, catching it as soon as it happens. I’ve given up on this multi-row efficiency. I stand up after each row, move the row, and check. It seems the only way to assure all is well.
Another issue has developed concerning thread tension. My initial warp was not 100% even, and I had to deal with that. Things have been quite smooth since …. until lately. I’ve noticed that there is another couple of threads loose lately, causing troubles. I’ve identified them as the threads at the very edge. This happens every time, indeed makes sense. The edge thread, the thread involved in that three-thread edge stitch on the plait row, makes only half the number of rotations as all the other threads. Uptake is less for this thread. I’ve resolved the issue with this thread being longer.

I pulled that extra thread up, leaving a loop off the edge of the cloth.

I will try to remember to pull on that loop thread before the final finishing, completely erasing all evidence of this problem.
While on the subject of yarn uptake, with this very fine silk I’m noting an uptake of one inch per foot. When I work on wool sashes with a much thicker yarn, the uptake can be around 3-4 inches per foot.