I dont use chalk, but simple pencil (the one that you refile it every time). I discovered that I brush the top with heavy starch and then I draw what I need, actually the pencil is on the starch not on the fabric.
The mistake that I did is that I forgot to mark the quilt before sandwitching, next time better.
thank you all for the advice.

I was told by a tailor never to use the coloured chalks on the face of the fabric (right side) because the colour pigments don't (always) come off. And in tailoring, when using £40 per metre cloth, you just don't run the risk....

I used blue chalk on a quilt, and didn't brush it off right away. Now I have blue marks....so if you are using colored chalk, mark as you go and brush it off right away.

As usual, it depends. First, always test your pencil to make sure it will come off when you are finished. A pencil that comes off on one fabric, may not come off on another.

The easiest time to mark a quilt is before it is sandwiched, so if you know what you will be quilting then you should mark the whole quilt. Of course, it would be a waste of time to mark the whole quilt if you are using something that will come off before you are finished, like air-erasable marker or chalk. Then you should mark as you go. I usually don't decide what I'm quilting ahead of time so I generally mark as I go.

Hi there,
Small question, I learned from Sharon Schamber to draw the quilt pattern with inexpensive pencil so it is easy to get rid of.
My question is do I need to draw the pattern on ALL OVER the quilt or only on the area that I am busy with?