Discussion
Pigment volume concentration is the ratio of
Answer: D
Correct answer: pigment volume to total solids volume
\[ \mathrm{PVC} = \frac{V_{pigment}}{V_{pigment}+V_{binder}}, \] expressed on the dry film, so solvent does not enter it. It is a volume ratio rather than a mass ratio because what matters is whether there is enough binder to fill the space between the particles - which is the question the critical value answers.
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