Thanks for asking the ? I to have been looking for something that I can mark dark fabric with. i have try so many things and have not found the right one for me. I have try for color penicls have not been happy with them, try dress maker chalk it would not make a mark dose it get to old or dry out? I'm likeing the chalkboard chalk idea will be gaving that a try. thinking make the 60 mile drive to joAnn and use my coupon on the a ceramic or mechanical pencil or both or maybe will talk myself out of goning until I try the chalkboard chalk.