UV Crystal Beads
Make pretty bracelets with a twist – these crystal beads change colour in sunlight!
These crystal beads remain transparent indoors under regular light bulbs, but expose them to the sun’s UV radiation they change a variety of lovely colours. The stronger the UV present, the more pronounced the colour change.
These incredible beads contain an interesting pigment that reacts to UV light, causing molecular shape and colour changes – a light induced chemical reaction called photochromism. Because the reaction is reversible, when the colourful crystal beads are bought indoors away from the sun’s UV rays they change back to their original clear transparency. They can change colour and back again thousands of times.
Try putting sunscreen on a bead to see how it effects colour change. How effective is the sunscreen in blocking UV light? How about sunglasses? To what extent do they block UV light?
Contains: approx. 30 large crystal UV beads, elastic bracelet thread, metal keyring and instructions.
This product is also available for purchase in store at Space Place.