Derwent Inktense Pencils are one of the best water-soluble pencil ever! You can use them dry but mix them with water and WOW! the colour turns into vibrant ink.
Once it’s dry the colour is fixed and you can work over the top of it, and, because of its permanent feature it’s great for using on fabric such as silk and cotton!
Available in sets of 12, 24, 36 & 72