What is non-repro blue, and why is it important to artists, illustrators, and designers? This particular shade of blue is not picked up by copy machines, which allows users to freely sketch ideas without having to worry about erasing those lines before copying or printing their work.
Light blue pencil lead is an artist favorite for use in drafting and mechanical pencils. It is perfect for brainstorming, and won't show up when it is time to move the process forward. For those who prefer ink, a micro tip pen with light blue ink performs the task as well.