UV pigments actually change their structure to a coloured form, under direct contact with ultraviolet light, after which the additional visible light which reaches the pigment is reflected as colour.
Friday, 7 May 2010
UV reactive pigments
As a group we have discussed other possibilities and technologies to best suite the product we wish to sell. UV reactive pigments could be a more modern alternative to leuco pigments and may be more appetizing to the consumer. The UV reactive pigments are colourless indoors but when exposed to the UV light emitted by the sun turn bright colours. This is a much different phenomenon than that of fluorescence, in which a dye or pigment absorbs one wavelength of light, usually invisible ultraviolet light and then emits that same energy as another wavelenght.