Material Photochromic materials
Photochromic materials change reversibly colour with changes in light intensity.

Usually, they are colourless in a dark place, and when sunlight or ultraviolet radiation is applied molecular structure of the material changes and it exhibits colour. When the relevant light source is removed the colour disappears.

Changes from one colour to another colour are possible mixing photochromic colours with base colours. They are used in paints, inks, and mixed to mould or casting materials for different applications.
Category Responsive (smart) materials, Colour changing materials
Products Photochromic T-shirt
References Detco Enterprise
Matsui International, Inc.
Environmen- tal notes Use: Photochromic compounds pass food container and packaging standards, and producer claims that they do not contain toxic substances.
Photo Thomas Nissen (Computer graphics)
Copyright © 1996-2019 Torben Lenau
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