The common measurement of hiding power is through the covering power cardboard (black and white grid paper), on which a wet film coating with a certain precision is prepared by a wire Bar Coater (recommended instrument: wet Film Thickness Gauge) , and after drying, it is passed The eye is used to observe the covering power.
Measurement of hiding power
Hiding power (%) = Y black/Y white *100 (%)
100% is complete coverage, i.e. there is no difference in the applied film between the black and white areas.
Testing steps for hiding power
Apply the paint evenly on the hiding power card according to the film coating steps. After the coating film is fully air-dried, use an instrument for objective evaluation. The hiding power value can be measured within 1 second and displayed automatically. The same procedure can be applied to the opacity detection of transparent film and plastic products.
