I love the speed, spontenaity and feel of ink and brush work, also the way the ink flows with water washes to give wonderful sky textures.
I use Indian Ink with brushes or calligraphy pens to make sketches/drawings outside on various sizes of 300gsm Fabriano watercolour paper.
Whilst I use these works as reference when back in the studio they are often finished pieces in themselves. The simplicity of black, white and tonal marks expresses the scale of landscape.