|While I'm waiting for my Bernina to be repaired, I'm doing a lot of pattern tracings for my DD. Many patterns seem to have very uneven and light ink, which makes them hard to trace. So I trace them with a permanent marker before I lay tissue paper over them to trace again for my first attempts at alterations. (Sharpies have ink that doesn't smear, rub off, or run if damp.)
I really like to work on my cutting mat surface while I alter because of the grid lines and the smooth surface, but I didn't want marker ink seepage on my green cutting mat. I found a green sharpie marker in my stash of office supplies and used it. Voila! My marks don't show and I can easily see my tracing marks.