Pigment Black 7 is added at approximately 10% of the total black in the coating while the same pigment-to-binder ratio is maintained.
In a study of the pigment-to-binder ratio in a glossy polyester powder coating, the refined rubber has a pronounced effect on the coating appearance.
30-mm thick coating having 14% pigment-to-binder ratio.
5) A high pigment-to-binder ratio and a low refractive index binder are, in particular, important in making reflective coatings.
Addition of silicones or other surfactants should reduce surface tension gradients, and a higher pigment-to-binder ratio
or addition of a thixotrope will reduce the rate and amount of flow to or from the edge.