| 摘要 |
A method of marking a textile comprises: providing a textile comprising a markable yarn, configured to emit visible light when exposed to ultraviolet radiation. The amount of visible radiation emitted by a portion of the yarn when exposed to ultraviolet radiation is attenuated following exposure of the portion to a bleaching medium. The exposed portion is substantially indistinguishable using the naked eye from an unexposed portion when exposed to visible radiation and not to ultraviolet radiation. This is preferably achieved by including a fluorescent dye such as umbelliferon of 7-hydroxycoumarin within or upon the yarn. The dye may be included in the melt used to form the yarn. The bleaching is preferably achieved by exposing the yarn to a bleaching medium such as laser or ultraviolet light above a critical intensity, and preferably by scanning a laser beam over a portion of a textile comprising the yarn. Alternatively the bleaching medium may be X-ray or chemical. A mask, preferably LCD, may be used to define the portion of the textile exposed to the bleaching medium. The textile, preferably loom woven, incorporating the yarn may thus be marked to produce labels with alpha numeric characters, an image or a barcode. |
