Basics of Physics in Determining Density Values
The density value is always determined with the following tools:
•with a densitometer with "real", that is physical, color filters for red, green and blue and with a visual filter.
•with a spectrophotometer. In this case, the characteristic of the color filters is described numerically. The density value is calculated from the measured spectra using numeric filter curves.
The density value is a dimension for the absorption of light (certain wavelength ranges) by a color. The actual dot percentage is computed from the density value.