Linda Weintraub and Natalie Jeremijenko want to artists to make their materials and mediums themselves from resources around them, rather than always sourcing from art stores.
Linda Weintraub is a curator, educator, artist, and author. Her many books including To Life: Eco Art in Pursuit of a Sustainable Planet, Cycle-Logical Art: Recycling Matters for Eco-Art, and Eco-Centric Topics: Pioneering Themes for Eco-Art.
Natalie Jeremijenko is an artist and engineer known for her projects such as How Stuff is Made, Feral Robots and Environmental Health Clinic.
You can access recipes and instructions as well as contribute your own at DIY Mediums.