This Photochromic Pigment set can be used to demonstrate and investigate light reactive Smart Materials
The Kit contains:A set of 3 x Photochromic Pigments (Purple, Orange and Magenta)
UV Fluid
Glow in the Dark PigmentPhotochromic Pigments:These pigments normally have a pale, off‐white appearance but in sunlight or UV light they instantly change to a bright, vivid colour
The pigments revert to their pale colour when away from sunlight or UV light
Supplied in a plastic syringes containing 3g of pigment
UV Fluid:This liquid is non‐toxic liquid paraffin containing a UV sensitive photochromic dye
Indoors it appears as a clear liquid but when exposed to natural light it immediately becomes coloured
This colour increases in intensity when exposed to direct sunlight
The colour change is reversible, although it takes about 60 seconds for the liquid to become clear again
Makes a fantastic demonstration of photochromic phenomena
The same dye chemistry is used in photochromic lenses, special window glass etc
Photochromic cells, for quantitative measurements, can be made, by trapping a drop of the fluid between microscope slides or petri dishes
The material can be activated by UV
Supplied as a 50ml pot
Glow in The Dark Pigment:This pigment absorbs and stores sufficient energy to give an afterglow lasting up to ten times longer than zinc sulphide phosphorescents
After exposure to natural or artificial light, it will glow practically all night
The pigment can be mixed and applied with white acrylic paint
When the acrylic hardens, it effectively locks the pigment into a water–resistant film
It should be noted that the pigment is highly concentrated and only very small amounts are needed to produce glow–in–the–dark effects
Supplied as a 5g pack in a clear plastic container
