White Sapphire®: Built for Enhanced Oil Control

Long-lasting formulations start with the right oil-control ingredient. Here's how White Sapphire® uses surface area and oil absorption capacity to deliver measurable, long-wear performance:

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Executive Summary

• Grade selection made simple: White Sapphire® Matte is the answer for formulations where oil control and a dry, non-greasy finish are the priority

• The real cost of sebum breakdown: wear time in colour cosmetics, effective SPF in sunscreen

• The physics behind oil control: how BET surface area (4-7.5 m²/g) and oil absorption capacity (50-100 g/100g) set a testable performance ceiling, not a marketing claim

•  Why adsorption beats coatings: a mechanism that doesn't degrade under shear, heat, or pH shift

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White Sapphire® Matte: The Grade Selection for Optimised Oil Control Performance

Where oil control and a dry-touch finish are formulation objectives, White Sapphire® Matte is the applicable grade. Its high surface area drives a pronounced dry-feel effect, absorbing excess oil to deliver a matte, non-greasy finish in place of the residual tack introduced by some UV filters and emollients, particularly in high-oil sunscreen and emulsion systems. That same absorption capacity underpins wear time, resisting the sebum- and sweat-driven film breakdown that shortens product longevity.

Request a White Sapphire® Matte sample to validate these performance specifications against your own formulation.

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Why Oil Control Matters Beyond Shine

Sebum management is not secondary to SPF or pigment performance; it is structural to formulation integrity. Once a powder's absorption capacity is exceeded, the film begins to break down under sebum and sweat, compromising wear time in colour cosmetics and UV protection in sunscreen. Sebum resistance at the powder surface, measurable using contact angle methods, correlates directly with long-wear performance (Bui et al., 2019). In sunscreen systems the stakes are higher: this same breakdown drives uneven UV filter distribution, which can reduce effective SPF over the course of wear (Geoffrey et al., 2019). Failure at this stage doesn't present as visible shine; it presents as a measurable drop in UV protection at the point of greatest exposure.

This is the mechanism behind the SPF 50+ anti-sweat sunscreen formulation developed by Brisbane dermatologist Dr Russell Hills using White Sapphire®, built to hold UV filter distribution stable through heavy sweat rather than relying on reapplication to compensate.

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What Drives White Sapphire®'s Oil Control Performance

White Sapphire®'s performance is governed by two measurable properties: a BET surface area of 4 to 7.5 m²/g (ISO 9277), which sets the surface available for sebum to adsorb onto, and an oil absorption capacity of 50 to 100 g per 100 g (ISO 787-5), which sets the point at which the powder saturates and stops managing oil. Because the mechanism is physical adsorption rather than a chemical reaction (Ergin & Suvaci, 2025), these figures define a testable ceiling, not a marketing claim.

This distinguishes White Sapphire® from ingredients that rely on surface coatings to simulate oil resistance. Coating-dependent performance is subject to degradation under shear, processing heat, or formulation pH shift, compromising oil control mid-process or mid-wear. Adsorption driven by intrinsic surface area and porosity is not subject to this failure mode. Both White Sapphire® Matte and Glow grades offer this capability, a two-grade range not available from most single-SKU alternatives.

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Technical Summary

White Sapphire®'s oil control performance rests on two measurable properties. BET surface area sits at 4 to 7.5 m²/g, determined by gas adsorption per ISO 9277:2010, and defines the total area available for sebum adsorption per gram of powder. Oil absorption capacity sits at 50 to 100 g per 100 g, determined per ISO 787-5:1980, and defines the saturation point beyond which the powder can no longer manage additional sebum. Together, these figures set the ceiling and ceiling type behind every oil-control claim made for the ingredient. The mechanism underpinning both is physical adsorption, governed by surface area and porosity rather than chemical reactivity, which is what makes performance predictable and testable across batches (Ergin & Suvaci, 2025).

The practical relevance of this mechanism spans both major use cases. In colour cosmetics, sebum resistance at the powder surface, quantified via contact angle measurement, is an established indicator of long-wear performance (Bui et al., 2019). In sunscreen systems, the stakes are higher: formulation breakdown under sebum and sweat is linked to uneven UV filter distribution and reduced effective SPF over wear time (Geoffrey et al., 2019), which is why oil control functions as a specification in sunscreen formulation rather than a purely sensory attribute.

On safety and regulatory status, White Sapphire® is ECOCERT COSMOS Version 4 certified, manufactured under GMP conditions, non-nano, and not dermally absorbed through intact skin. Full performance data, including batch-level BET and oil absorption results, is available on request from White Sapphire®.

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References

Advance ZincTek. (2024). White Sapphire® product performance data. Internal testing documentation. Available on request from https://www.advancezinctek.com

Bui, H. S., Hasebe, M., & Ebanks, J. (2019). Evaluation of sebum resistance for long-wear face make-up products using contact angle measurements. In K. L. Mittal (Ed.), Advances in Contact Angle, Wettability and Adhesion (Vol. 4, pp. 193–221). Wiley-Scrivener. https://doi.org/10.1002/9781119593294.ch10

Ergin, N., & Suvaci, E. (2025). Advanced metal oxide powders for cosmetic science. Open Ceramics. https://doi.org/10.1016/j.oceram.2025.100832

Geoffrey, K., Mwangi, A. N., & Maru, S. M. (2019). Sunscreen products: Rationale for use, formulation development and regulatory considerations. Saudi Pharmaceutical Journal, 27(7), 1009–1018. https://doi.org/10.1016/j.jsps.2019.08.001

International Organization for Standardization. (1980). ISO 787-5:1980 — General methods of test for pigments and extenders — Part 5: Determination of oil absorption value. ISO.

International Organization for Standardization. (2010). ISO 9277:2010 — Determination of the specific surface area of solids by gas adsorption — BET method. ISO.