Interesting. Here's another site I have bookmarked. She says it's permanent, too. Also she uses a steamer. I have a small one that I don't like so I plan to get a good one like this eventually.
I don't understand the permanence either, but maybe if its washed and dried flat vs the dryer it makes a difference? I've gotta test this by knitting a couple squares and testing them. Please let us know if you try it.
Sue... I usually just wash and dry acrylic, but that is still not always effective for some things. I don't feel that those who take the time for it are people with too much time on their hands. May e just perfectionists.