DENSITY / DENSITY DIFFERENCE
The critical function of a densitometer is to determine density,
a measure of the opacity (light absorption) of an object. It is a
function of the chemical nature and concentration of the ink
pigment particles and the ink film thickness.
By using a densitometer the user can interpret the work output
systematically. It eliminates the guess-work of adjusting the
ink displacement. Increase or decrease of the amount of ink
applied during a run can now be done numerically.
Density Equation:
Density = log
10
1/R Where R = Reflectance
Density Difference Equation:
Density Difference = Sample Density - Reference Density
Measurement Location:
Density measurement is made on the solid patches of the color
bar.
