Every OxiWhite grade ships with a technical datasheet, but the figures only help if you know what they mean for your line. This glossary explains the specifications buyers ask about most, and why each one matters in paints, coatings, plastics and masterbatch.
Purity and crystal form
- TiO₂ content (%)
- The active pigment fraction. Higher TiO₂ content generally means more opacity per kilo, provided the surface treatment suits your binder or polymer.
- Rutile content (%)
- The share of pigment in the durable rutile crystal form. Exterior and high-performance grades are typically ≥ 97 % rutile.
Processing behaviour
- Oil absorption (g/100 g)
- How much binder the pigment soaks up. Lower oil absorption allows higher pigment loading before viscosity limits you — key for high-solids coatings and concentrated masterbatch.
- Dispersibility / Hegman value
- How quickly and finely the pigment breaks down in your medium. Higher values mean shorter mill times, smoother finishes and fewer specks in film.
- Residue on sieve (45 µm, %)
- Oversized particles left on a standard sieve. Low residue protects screens and dies and reduces defects in thin films and fibres.
- Volatile matter / moisture (%)
- Water and volatiles in the pigment. Low values matter in plastics, where moisture can cause voids, foaming or hydrolytic degradation at processing temperature.
Optical and colour properties
- Whiteness / brightness
- The pigment's reflectance. Higher whiteness gives cleaner pastel shades and brighter whites in coatings and plastics.
- Tinting strength / CBU
- How effectively the pigment whitens a coloured system. Colour black undertone (CBU) is the common plastics measure — higher CBU means more colouring power per kilogram.
- Hiding power / scattering power
- The ability to obscure the substrate. A primary driver of how much pigment a paint film needs per square metre.
Surface treatment
Most rutile grades carry an inorganic coating (alumina, silica, zirconia) and often an organic treatment. Inorganic coatings improve weathering resistance and dispersibility; organic treatments improve wetting in the target system. Two grades with identical purity can perform very differently because of this finishing step, so always check it against your binder or polymer chemistry.
Compare the real figures
Every grade page on this site carries its full specification table and a downloadable PDF datasheet. Browse the grades to compare, or send us an enquiry if you'd like help interpreting a specification for your process.