How to Take a Picture Using The Sun 🤯 (@katherinetjacobs)

[0:00]As she paints this green liquid onto paper, she's actually taking a photo without a camera. Because this is a 200-year-old process called cyanotype, which was used by scientists to document plants in perfect detail. As after she places flowers across the surface, they're pressed flat under glass and left in direct sunlight. Where the UV rays darken the exposed areas, while the flowers block most of the light, as thinner petals still let just enough through to capture every detail. So when it's finally rinsed with hydrogen peroxide, the reaction instantly oxidizes the surface, turning it into a deep blue photo made entirely by the sun.