Instead, in the present study, centrifugation was used for the determination of packing density to develop an understanding as to how changes in the coating pigment and pigment-to-binder ratio
impacts the void volume.
Pigment Black 7 is added at approximately 10% of the total black in the coating while the same pigment-to-binder ratio is maintained.
Pigment Black 7 at the same pigment-to-binder ratio. However, the elastomer pigment can be loaded to much higher P:B as compared to the carbon black while maintaining acceptable rheological properties.
The light reflectors were made applying this coating material to an aluminum substrate; their diffuse reflectance was measured and found to vary from 97% to 100% for 0.30-mm thick coating having 14% pigment-to-binder ratio. The aging effect of the reflectors with respect to temperature and illumination was also investigated to check their durability and they have been found to be optically stable up to 10,000 lux, and thermally up to 80[degrees]C.
(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.
These concentrates are produced using optimized pigment-to-binder ratios
and incorporation methods to maximize their brilliance and metallic effect.