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