solarisation

/ˌsoʊlərəˈzeɪʃən/
noun
  1. The process of treating or exposing something to sunlight, especially for sterilization or disinfection.
    • Solarisation is an eco-friendly method for purifying water in remote areas.
    • The farmer used solarisation to sterilize the soil before planting new crops.
    • Solarisation of drinking water using clear plastic bottles can kill harmful bacteria.
  2. A photographic effect where an image is partially reversed in tone due to extreme overexposure, creating a surreal look.
    • The vintage photo had a striking solarisation effect that made the sky look black and the trees white.
    • The artist used solarisation to give her portrait a dreamlike, inverted appearance.
    • In darkroom photography, solarisation can be achieved by briefly exposing the print to light during development.
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