The Mars Lumograph Aquarell pencil is a graphite pencil that reacts with water.
 
 
STAEDTLER Mars Lumograph Aquarell Pencils are premium quality with a special lead formulation.
 
They are also water soluble graphite pencils, which are great for shading and adding interest to sketching.
 
 
Break-resistant through special lead formulation and super-bonded lead, mixes with watercolour pencils and paint for effects.
 
 
Lead diameter 8B - 4.5mm 6B/4B -3.6mm