I do the same but use washaway stabelizer. I trace the quilting design on the stabilizer pin it to the quilt top with small quilting safety pins and start quilting. It has always washed out with no residue of any kind left on the quilt top. I have done this on full size quilts to small miniature quilts. You can see it no matter what color the fabric is.

I've had the blue water soluble show back up also. And please do not use colored chalk, I've have several things w/chalk marks on them that won't come out! I have been very pleased w/the Crayola markers, no problems w/them at all so far. I have used the Roxanne pencils and they didn't wash out either. I have used school chalk but I guess I should try a different brand because mine always breaks w/in a few minutes of starting to draw.

And for my oops...I once used a Vis-A-Vis pen on a quilt thinking it would wash out since it is a water washable pen, but that only works on plastic not fabric. Thankfully the pen color sort of blended in w/the quilt fabric so not really noticeable.

How do you mark with a Hera? On a hard surface after sandwiching? Thank you.

Temporary - in this case - means one can see the line for as long as one wants to see it - but can be removed completely from the fabric - with no residual effects on the fabric - by washing or erasing when one wants it gone.

I use mechanical pencils, they leave enough of a mark for me to follow and always come out in the wash.

Beautiful!

It's not just ironing that sets the marks!
I was working in a room that gets very warm during the afternoon and I had stopped working on a quilt and when I went back the next morning... Yup all my marks were back!!! Scary!

I use a pen called a "Frixion" pen...goes on like an ink pen and then when you apply heat from the iron (or friction) it completely vanishes.

I've been using Crayola Washable Markers for over 10 years now and have never had a problem with them not washing out. Love them!

I also use Crayola markers and have not had a problem, especially if you wash the quilt rather than try to blot them out.