Watch | Artwork made of polluted water

Aptly named 'dirty watercolour', these are paintings created with pigments made from water found in polluted rivers. Sediments were extracted from the river water to produce dark, earthy pigments that were sterilized to avoid bacterial contamination. Each painting depicted everyday scenes found along Manila's riverside, from children taking a dip in polluted water to people taking shelter under a bridge. Artists took careful attention to using watercolour as a tricky medium and the challenges of using an unconventional pigment.