Colour tracing paper

Details Colour tracing paper Colour tracing paper

D - Textiles, Paper

21

H

D21H 11/18 (2006.01) D21H 21/18 (2006.01) D21H 21/28 (2006.01) D21H 23/04 (2006.01) D21H 27/06 (2006.01)

Patent

CA 2265450

The invention concerns a translucent and/or transparent paper with an intense colour, having an colour intensity c and luminosity L, as measured with a Hunterlab apparatus, measuring the cartesian co-ordinates a, b, L from a colour point P and its polar co-ordinates H and c. The paper is such that the ratio c to L is greater than 30 %, preferably greater than 50 %. The paper comprises a colouring agent in its volume, preferably from 5 to wt. 10 % of liquid colouring agent relative to the weight of the finished paper. The colouring agent is a dye which fixes itself directly on cellulose. The invention is applicable to paper used in the field of printing or writing.

L'invention concerne un papier translucide et/ou transparent qui possède une couleur intense. Le papier a une intensité de couleur c et une luminosité L, telles que mesurées avec un appareil Hunterlab, qui mesure les coordonnées cartésiennes a, b, L d'un point P de couleur et ses coordonnées polaires H etc. Le papier est tel que le rapport de c à L est supérieur à 30 %, de préférence supérieur à 50 %. Le papier comporte un colorant en masse, de préférence de 5 à 10 % en poids de colorant liquide par rapport au poids du papier fini. Le colorant est un colorant qui se fixe directement sur la cellulose. Application à un papier utilisable dans le domaine de l'impression et/ou l'écriture.

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