photochromic sentence examples

• Photochromic dyes are effective but not environmentally friendly and in many cases are not suitable for dyeing textiles or leather substrates.
• Photochromic lenses are made with an outer layer of halide crystals which absorb some uv light.
• Photochromic material to automatically darken in bright light, saving the need for separate sunglasses.
• Photochromic technology which actively tunes the amount of light that reaches your eyes.

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