Earth and Rowan: Eco-Friendly Non-Toxic Fine Arts Products This Ireland-based site makes its art products without any petro-chemical ingredients. Some of their drawing materials including Willow Charcoal, Red Sanguine Chalk, Raw Sienna and Chunks of Graphite. Their ethically produced natural art products iclude Watercolour half pans, Liquid Watercolour, Egg-Oil paint, Pastels, Inks, Papers and Canvas.