These pigments normally have a pale, off-white
appearance but in sunlight or UV light they change to a bright, vivid colour.
The pigments revert to their pale colour when away from sunlight or UV light.
If the pigment is mixed with a binder, such as an acrylic base, it can be
permanently applied to almost any surface. The more dilute the pigment, the
less dramatic the colour change. The mixing proportions are a matter of trial
and error, but a 50:50 mix is a good starting point. The practical applications
of the pigment are almost limitless.
The active photochromic dye is contained in
micron-size microcapsules dispersed in water to make up the pigment, which has
the consistency of thick cream.
Uses range from UV warning systems to 'smart
graphics' in publications and packaging and garment design.
Methods of application include brush painting,
block printing, stencilling, screen printing etc.
3g supplied in a plastic syringe.
Reasons to Love
Cross applications in Science, Design
Technology and Art classes
Learning Outcomes
GCSE Chemistry - Smart Materials: Light
Reactive
Top Tips
The pigment can be mixed with a binder, such
as an acrylic base, it can be permanently applied to almost any
surface.
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