well I finally tried it and wish I'd been doing it for years! it worked waaaay better than I thought it would, shows up on all but white. sometimes when you sew on the marking lines it doesn't wash out, I needed to sew on all the lines and certainly didn't want the lines to show forever so I tried it, it kept a good edge longer than I thought it would which is why I never tried it, so this morning I bathed with that little thin bar again so I could sharpen up the edges to finish my project.
just goes to show you, old dogs can learn new tricks if they have a reason!

I didn't know you could use soap for marking ... will have to give it a go. Happy quilting :)

My aunt used to mark all her quilts with soap slivers. But she always used a plain white bar of Ivory soap.
I don't know if the colored type of soaps with softeners and deodorant additives would wash out as easily, but you could test it.

Are hand or machine quilting??

After trying every other kind of marker I used soap on a quilt with black borders that I recently did. I was amazed at the results and will keep it on my list for future projects.

So glad that you shared this! I never heard of using soap before...

If it doesn't wash out, doesn't that then create another problem?

Seems like a repeat washing would do the trick.

I have used soap slivers for years. On some designs I do use the washable marker and have never had any problems with either. :thumbup:

I use soap to mark, have for years. When I need to sharpen the edge a little I just slide it between the blades of my thread nippers a few times. I also use soap to keep my needles slick and sharp for hand quilting.