Method for application of colours and tonalities to various...

B - Operations – Transporting – 41 – M

Patent

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Details

B41M 1/18 (2006.01) B41M 1/20 (2006.01) G03F 5/22 (2006.01) H04N 1/52 (2006.01) H04N 1/60 (2006.01)

Patent

CA 2279529

The invention relates to a method for applying colours by subdividing them according to their percentages allocated to each of the printing points which are for example divided centesimally in accordance with a rule which defines the distribution of appropriately superimposed basic colours, thereby creating binaries and blacks according to the subtraction of the percentage of the basic colour most used perceptually from the sum of basic colours less used perceptually. Thus, the totality of visible colours are optically generated. The background of the surface to be printed is previously analysed and the perceptual quantity in each point of the based colours is deducted in the proportion contained in said background. The application of pigments is carried out by addition of a transparent substrate or medium or white until the proportion of each colour is completed. Application to graphic arts and to the computer reproduction of colours.

Procédé pour l'application de couleurs et de tonalités sur différentes surfaces. L'invention concerne un procédé par lequel l'application de couleurs est menée à bien au moyen d'une sous-division de celles-ci conformément aux pourcentages répartis sur chaque point d'impression. Les pourcentages sont, par exemple, divisés centésimalement, conformément à une norme déterminant la répartition des couleurs de base convenablement superposées, ce qui a pour effet de créer des bichromies et des noirs selon l'ampleur de la soustraction entre la somme des couleurs de base les moins utilisées en termes de pourcentage et la couleur de base la plus utilisée en termes de pourcentage. C'est ainsi que se créent optiquement la totalité des couleurs visibles. Le fond de la surface à imprimer est analysée au préalable et on soustrait la quantité en pourcentage sur chaque point des couleurs de base dans la proportion contenue dans ledit fond. L'application de pigment est effectuée par addition d'un substrat transparent ou d'un médium ou d'un blanc jusqu'à ce que la proportion de chaque couleur soit complète. L'invention est conçue pour les arts graphiques et la reproduction informatique de la couleur.

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