Method for Spectral Colour Density Measurement in Colour Printing

Abstract

A method for spectrally measuring colour density in colour printing, in which a spectrally resolved reference reflectance is measured for an unprinted substrate with a spatially resolved spectral measuring system at a plurality of measuring points. At least one colour measuring field, preferably a plurality of colour measuring fields, is printed with a printing ink using a colour printer. The spectrally resolved reflectance for at least one colour measuring field is measured with the spatially resolved spectral measuring system at a plurality of measuring points and in which a colour density for the printing ink is calculated for each measuring point from the spectral distribution of the measured reflectance. The measured reference reflectance and a spectral weighting function representing the printing ink. The invention solves the technical problem of improving spectral colour density measurement in colour printing.

Dependencies are inferred from the claim text.