How ZinClear-IM™ 50CCT Helped Dr Denis Dudley Create a More Wearable Mineral Sunscreen

---

Mineral protection without the usual compromise

For many consumers, the biggest barrier to using mineral sunscreen is not belief in zinc oxide. It is the user experience.

Traditional zinc oxide sunscreens have long been associated with a visible white cast, a heavy skin feel, or a greasy after-finish. For individuals seeking daily facial protection, especially under makeup or on darker skin tones, those issues can be enough to stop them choosing a mineral formulation altogether.

Dr Denis Dudley, co-founder of CyberDERM and The Sunscreen Company, set out to address exactly that problem: how to deliver high-performance mineral UV protection in a formula that people would actually enjoy wearing every day.

A key part of that solution was the selection of ZinClear-IM™ 50CCT from Australian zinc oxide specialist Advance ZincTek.

About Dr Denis Dudley

Dr Denis Dudley is a Canadian physician and mineral sunscreen pioneer. He is a board-certified obstetrician-gynaecologist with subspecialty experience in maternal-fetal medicine, high-risk obstetrics and reproductive endocrinology.

His interest in sunscreen safety began through clinical practice, when questions from patients about sunscreen use during pregnancy led him to look more closely at the ingredients commonly used in conventional sunscreens.

Together with his wife, dermatologist and photobiologist Dr Sharyn Laughlin, Dr Dudley co-founded CyberDERM and The Sunscreen Company. Their work has focused on creating mineral-based sunscreens that combine medical credibility, strong UV protection and improved cosmetic elegance.

The formulation challenge

Mineral sunscreens are often chosen because zinc oxide provides broad-spectrum UV protection and is widely recognised as a trusted mineral UV filter. But for formulators, zinc oxide presents a difficult technical challenge: the same physical properties that make zinc oxide effective can also make it visible on skin.

High-zinc formulations can appear white because zinc oxide particles scatter visible light. Many conventional zinc oxide preparations, including pigment-grade, micronised and some nanoscale materials, can still produce a whitening effect or a heavier sensory profile.

For Dr Dudley, the goal was not simply to make a mineral sunscreen. The goal was to make a mineral sunscreen that addressed the most common consumer objections: white cast, greasiness and poor daily wearability.

As he explained in an interview with Beautiful With Brains, his advice to women hesitant to try mineral sunscreen was direct: try a well-formulated product. His own sunscreens were designed to leave a silky, matte, dry-touch finish, with a dispersion that may appear white from the pump but becomes clear with spreading.

Why ZinClear-IM™ 50CCT was selected

Dr Dudley selected ZinClear-IM™ 50CCT, a 50% zinc oxide dispersion in caprylic/capric triglyceride, because of its ability to help formulators produce mineral sunscreens with greater transparency and improved aesthetics.

ZinClear-IM™ technology is based on zinc oxide particles with a unique internal microstructure. This porous structure helps create a closer refractive-index match between the zinc oxide particles and the surrounding carrier oil.

In practical terms, that matters because visible whiteness is caused by light scattering. When the refractive index of the zinc oxide particle is more closely matched to the surrounding emollient phase, less visible light is scattered back to the eye. The result is a zinc oxide dispersion that can appear significantly more transparent on skin than conventional zinc oxide systems.

This is why the choice of dispersion is so important. A sunscreen’s final appearance is not determined only by the zinc oxide percentage on the label. It depends on the particle structure, carrier oil, dispersion quality and the way the full emulsion preserves that refractive-index matching on the skin.

The science behind improved transparency

Zinc oxide has traditionally been difficult to make invisible because of the way it interacts with visible light. ZinClear-IM™ approaches this challenge through particle architecture and dispersion design.

The zinc oxide particles used in ZinClear-IM™ have a porous internal structure. When dispersed in caprylic/capric triglyceride, the system is designed to reduce the optical mismatch that normally causes mineral sunscreens to look white.

This principle is connected to the same physics described by Snell’s Law: when light moves between materials with different refractive indices, it bends and scatters. When the refractive indices are more closely matched, light scattering is reduced.

For a consumer, the result is simple: a mineral sunscreen that spreads more transparently and is less likely to leave the obvious white cast associated with many high-zinc products.

The result: a more wearable mineral sunscreen

Dr Dudley’s experience shows how ingredient technology can change consumer perceptions of mineral sunscreen.

By using ZinClear-IM™ 50CCT, his team was able to create mineral sunscreen products designed for a silky, matte, dry-touch skin feel. The dispersion may appear white when first dispensed, but with proper spreading it becomes clear on the skin in normal light.

This makes mineral sunscreen more accessible to consumers who may have previously rejected zinc oxide because of whitening or greasiness. It is especially important for daily-use facial sunscreens, where cosmetic elegance can determine whether a person uses the product consistently.

About Antaria and Advance ZincTek

Antaria is the global trading and distribution subsidiary of Advance ZincTek, an Australian company specialising in cosmetic and pharmaceutical-grade zinc oxide powders and dispersions for sunscreens, skincare and personal care products.

Advance ZincTek has been operating since 1997 and is publicly listed on the Australian Securities Exchange. Its ZinClear product range is used by formulators seeking mineral UV filters that combine broad-spectrum performance with improved formulation aesthetics.

ZinClear-IM™ 50CCT forms part of Antaria’s specialist zinc oxide dispersion portfolio. It was developed to help formulators overcome one of the most persistent barriers in mineral sunscreen: achieving high-performance zinc oxide protection without an unacceptable white cast or greasy finish.

Why this case study matters

The future of mineral sunscreen depends on more than active ingredient selection. It depends on making mineral protection practical, elegant and desirable for everyday use.

Dr Denis Dudley’s work with ZinClear-IM™ 50CCT demonstrates how advanced zinc oxide dispersion technology can help bridge the gap between safety-focused formulation and consumer acceptance.

For brands and formulators, the lesson is clear: the right zinc oxide technology can materially improve transparency, skin feel and daily wearability.

For consumers, the outcome is even simpler: mineral sunscreen no longer needs to mean heavy, greasy or white.