One thing that I'll interject here is pigment/base systems vs. complete ink systems.
With my Union Mixo complete ink system, it's often tricky, even with a good scale, to mix small amounts of some formulas.
With pigments, some components can become infetesimally small when mixing small amounts. (It also used to be tough buying less than a gallon, but I think that may have changed)
So, mixing quarts and larger, probably no problem with a pigment system.
Mixing pints and 1/2 cups like I do, good luck!