Originally Posted by Kwiltr

For a fine white line on dark fabric, I like the ceramic chalk mechanical pencils, like Sewline's, or Fons and Porter, or Bohn. It's like pencil lead, about .7 mm thick. I find that as soon as I am stitching with a high contrast thread, fabric combo, I freeze up and tend to mess it up more often than not (. Clover also makes an iron off white gel type marker that showns up on dark fabric, but I don't use it as often as the fine ceramic pencil. Good luck with your project!