Staedtler Lumocolor Glasochrome Permanent Pencil White Single

Waterproof wood-cased pencil in up to 6 colours
Not water soluble, can be removed with a cloth dampened with methylated spirits
For opaque marking on almost all surfaces even on dark or transparent ones, e.g. paper, plastic, metal, glass, wood, leather and stone
No bleeding through paper
Wood from certified, sustainably managed forests