CPVC (Critical Pigment Volume Concentration)

The point where there is just sufficient binder present within a paint to cover each extender particle with a thin layer and fill all voids between particles. CPVC can be calculated from oil absorbtion (OA) as follows:

CPVC = 1/(1+ OAp/K)

where:

  • CPVC - Critical Pigment Volume Concentration
  • OA - Oil Absorbtion
  • p - specific gravity of the pigment
  • K - 100 x specific gravity of binder

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