Generally speaking, paint quality will be at its highest if every pigment particle is just enveloped by binder. This condition is not easy to achieve and to measure it is also a complicated procedure. One has to separate the "pigment cake", wash it with solvent, dry and weigh it.
The pigment cake is separated as far as possible from the binder (nearly dry) by centrifuging, a task that may prove difficult. Here it should be noted that, in many formulations, the amount of pigment only partly affects paint quality.
The type of pigment, particle size and shape, as well as particle size distribution can all be very important