Apologies to Synnove for not answering your initial question. I've not used Treasure thread. I've used all kinds of other hand quilting thread - all mentioned above - as well as JoAnn's Americana brand thread. The Americana brand is a bit heavier than the others but if it's the right color, I'll use it and actually like it quite a bit.
Joe'smom - thanks for that encouragement! I know silk thread is particularly strong but it did not occur to me to check any thread sites for usages. Yippee! Back to quilting!