FIELD: operative color control in printing presses for used primary and auxiliary colors by continuous conducting of spectral measurements in conjunction with linear equations for determining the required correction of printing ink feed for conservation of color precision in printing.
SUBSTANCE: when the color anomaly is exceeded, the measured values of the spectral reflectivity of the tested area are compared with the respective preset values, and the anomaly of the reflection spectrum is determined. The linear equations are used for correlation of the reflection spectrum anomalies with varieties of the solid ink density or thickness of the ink layer for ink feed control with the use of an operatively empitically produced corrective matrix, such that the reflection spectrum is minimized.
EFFECT: provided color control during printing with the use of spectral measurements.
65 cl, 4 dwg
