Powders, pigments, and a silicone elastomer that set slip, opacity, and finish u2014 boron nitride, silica, titanium dioxide, mica, and dimethicone crosspolymer u2014 for powders, foundations, and primers.
Sensory modifiers are powders, pigments, and elastomers added to set how anproduct applies and looks u2014 its slip, opacity, and finish u2014 rather than its bulknchemistry. They split into mineral fillers and pigments (boron nitride, silica,ntitanium dioxide, mica) and silicone elastomers (dimethicone crosspolymer). Use level isnusually a few percent in the powder or oil phase, so small changes in grade and particlensize shift the result.
nnBoron nitride functions as a slip and soft-focus powder in pressed and loose products,ncommonly at 1 to 10%. Silica is an oil-absorbing filler for a matte finish. The trade-off isnthat the higher silica loadings that cut shine also reduce slip and can read as dry, sonformulators pair silica with boron nitride or an elastomer to restore glide. Specify boronnnitride where slip is the priority and silica where oil control is.
nnTitanium dioxide is the standard white pigment and opacifier; mica is the workhorsenpearlescent for optical effect. Dimethicone crosspolymer is a silicone elastomer used fornsoft-focus optical blur and viscosity control in anhydrous and emulsion systems. Confirmnthe regulatory status of titanium dioxide for your application and jurisdiction, becausenpowder and inhalable uses face restrictions in some markets.
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