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Hopeway Imp. & Exp.Co.,Ltd
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Anatase is an excellent choice for filling of paper. It is economical, easily dispersed in water based systems, and an excellent opacifyer. Untreated Anatase provides over 98%+ pure TiO2 with a refractive index of 2.55. This form is also good for use in interior paints, plastic filling, and highway marking paints. With the exception of highway paints, it is not recommended for exterior (weather exposed) applications.
Rutile provides superior "wet" opacity, which is useful in wet strength paper grades, waxed papers, and other saturated applications. It is slightly more efficient than Anatase with a refractive index of 2.70, but it is more expensive. Rutile is often provided as a "treated" product, which aids in easy dispersion in high solids coatings. Treated products often contain less than 90% TiO2 with the balance being the "treatment". Rutile has superior weather resistant characteristics for applications with exterior (outdoor) exposure or where long term light fastness is important.
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