The CDP does not report droplets smaller than 2 [micro]m in diameter, but droplets below this limit lie near the maximum scattering efficiency
of both near-infrared wavelengths of the OID.
The size of the void is designed to optimize light scattering efficiency when it is dispersed into a continuous polymeric medium.
Past theoretical studies have evaluated the scattering efficiency of optimized HPP to be about 8 to 10 times smaller than rutile titanium dioxide pigments (Ti[O.
In this approach, the loss in scattering efficiency is correlated to the gradual overlapping of finite spatial intrinsic zones, also called scattering volumes, centered on each scatterer.
D]is the calculated (or measured) scattering efficiency of the system, and Si represents the scattering efficiency of the same system assuming independent scattering conditions.
2] particle and its surroundings, and thereby impacting the light scattering efficiency of the [TiO.
2] light scattering efficiency as the TiO2 content and average refractive index of the coating increase as predicted by Mie Theory.
The increase in scattering efficiency
on going from very large to very small extender particles is exactly equal to the decrease in scattering efficiency
when large particle extenders replace an equal volume of resin.
Also hiding power is lost because of the "crowding effect,"2 which describes the loss of scattering efficiency
of each individual Ti02 particle due to reduction in spacing between the Ti0(2) particles at higher loadings.
A major issue under constant investigation is the minimization of the loss in scattering efficiency
due to the pigment packing that unavoidably arises in highly concentrated paints.
These clusters severely reduce the scattering efficiency
of the paint film and increase the roughness or the number of defects of the paint film surface.
For example, titanium dioxide has three times the scattering efficiency
of zinc oxide.