Photochromic ink
This article does not have any sources. (March 2022) |
photochromic ink is a smart material that changes colour due to uv light. photochromic ink is used in glasses that change into sunglasses once exposed to uv light.
photochromic ink is a smart material that changes colour due to uv light. photochromic ink is used in glasses that change into sunglasses once exposed to uv light.