FIBRE OR FILAMENT

摘要

A filament or fibre (2) comprising a volume modulation colouration producing substance (6); containment means (8) for containing the substance in the form of an elongated core which containment means is at least partially light transmitting; and stimulation means (4) for stimulating the substance to produce a change in the volume of the substance, thereby changing the colour of the filament or fibre.