Rainbow Fibres
Patent No. EP1930501 (titled "Rainbow Fibres") was filed by D W Spinks Embossing on Aug 28, 2003. The application was issued on Apr 29, 2015.
Patent Summary
A fibre for counterfeit protection in paper products comprises a plurality of printed, coloured regions on its front and rear sides, where colours are visible exclusively under ultra-violet light. These regions may abut without overlapping to prevent pigment blending and create a difficult-to-replicate pattern. Fibre lengths typically range from 3mm to 10mm, with widths from 0.125mm to 0.5mm. An optional outer varnish layer protects printed regions from abrasion and improves affinity with the paper product. The paper product is manufactured by mixing these fibres into slurry paper pulp to form hydrogen bonds with cellulose fibres, then forming the mixture into a continuous paper web. The resulting paper product exhibits specific substance, tensile strength, bulk, porosity, humidity, and pH properties.
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Date
Description
EP1930501
- Application Number
- EP08003077A
- Filing Date
- Aug 28, 2003
- Status
- Opposition Procedure Closed
- Publication Date
- Apr 29, 2015
- External Links
- Slate, Register , Google Patents