Caran d’Ache Technalo RGB Coloured Water Soluble Pencils are available in Red (575 - Carmine Lacquer), Green (719 - Dark Phthalo Green) and Blue (159 - Prussian Blue). These pencils can be activated using water or can be used dry to achieve a subtle hint of colour. 

Caran D'Ache Water soluble pencils are available in 3 grades,  B, 3B and 6B, which will produce a range of grey tones.

The RGB and graphite pencils are made from the same water soluble graphite . Both made to the same high quality, these pencils have excellent lightfastness when used wet or dry.