Staedtler Lumocolor non-permanent omnichrom

Lumocolor® non-permanent Omnichrome 108 

Product information Water-soluble hexagonal pencil in a wooden frame, available in up to 6 colors For opaque markings even on dark and transparent surfaces as well as on paper, plastic, metal, wood, glass, leather and stone 

It can be washed off many smooth surfaces Doesn't bleed through the paper The optimal tool for industry and crafts Wood from sustainably managed forests, PEFC certified