1.Pilling: Ingredient Conflict, Not Over-application

Pilling comes from two main sources. First is ingredient incompatibility: anionic thickeners such as carbomer and xanthan gum, commonly used in sunscreens, react with cationic surfactants in subsequent skincare products, forming visible flocculent residues. Second is poor powder and film-forming system: large, poorly dispersed physical UV filter particles tend to agglomerate. Weak film formers with poor adhesion also flake off when rubbed, making pilling worse.

2.White Cast: A Mineral Sunscreen Issue Solved by Technology

White cast is unique to mineral UV filters (zinc oxide and titanium dioxide). Traditional micron-sized particles, larger than 150nm, scatter visible light and leave a chalky white layer on the skin. Poor dispersion and particle agglomeration make the whiteness even more noticeable. The solution is not to reduce mineral filter content, but to use nanotechnology to shrink particles below the visible light wavelength, combined with surface coating treatment — this delivers transparent, cast-free protection without losing UV blocking power.

3. Breakouts: Pores Trapped by Heavy, Occlusive Ingredients

Breakouts happen when the formula’s occlusiveness exceeds the skin’s tolerance. High levels of mineral oil, comedogenic esters, heavy emulsifiers and strong film-forming agents block sebaceous glands, trapping sebum and dead skin cells inside pores and eventually causing acne and closed comedones. Oily and acne-prone skin has lower tolerance to occlusive ingredients, and therefore faces higher breakout risk.

Formula Logic for Different Skin Types

Oily & Acne-Prone Skin: Lightweight and Non-Occlusive

Ideal formulas use an oil-in-water (O/W) or lightweight water-in-silicone system, with chemical filters or a low-ratio hybrid UV filter blend. Total oil content is strictly controlled, and only emulsifiers and oils with comedogenic rating ≤2 are selected. The formula is paired with oil-controlling ingredients and flexible film formers to create a light, non-greasy finish, while reducing powder agglomeration to prevent pilling and breakouts.

Dry Skin: Moisturizing and Non-Drying

Rich water-in-oil (W/O) or nourishing emulsion systems work best for dry skin. Skin-friendly moisturizing oils such as squalane and jojoba oil are added to relieve the drying effect of UV filters. Mineral filters can be included, but must be nano-sized and surface-coated to avoid white cast and heavy texture, paired with moisturizing and repairing ingredients for balanced protection and comfort.

Sensitive Skin: Gentle and Low-Irritation

Nano-sized pure mineral sunscreen formulas are the first choice. Zinc oxide and titanium dioxide are coated with silica or alumina to isolate direct contact with the skin and reduce friction irritation. Formulas use mild non-ionic emulsifiers, free of fragrance, alcohol and harsh preservatives, and are supplemented with soothing ingredients like ceramides and centella asiatica to minimize sensitization risk.

Core Manufacturing Technologies That Solve Sunscreen Pain Points

A high-quality sunscreen balances protection, sensory experience and safety, supported by three key technologies:

First, nano-particle coating and dispersion technology. High-pressure homogenization controls UV filter particle size precisely at 30–50nm, and silane surface coating eliminates white cast at the source, reduces agglomeration-related pilling, and lowers irritation.

Second, multiple emulsion system optimization. Water-in-silicone and water-in-oil-in-water structures deliver a lightweight outer feel with inner moisturizing benefits. More stable than single emulsion systems, they reduce both pilling and breakout risks.

Third, non-comedogenic raw material screening. Highly comedogenic oils and emulsifiers are eliminated at the raw material stage, paired with breathable film-forming technology to create a light, non-clogging protective layer and reduce breakout risk from the formula foundation.

For brands, a best-selling sunscreen is not the one with the highest SPF, but the one that matches target skin types and solves real consumer pain points. As a professional OEM partner, MOOYAM OEM provides custom sunscreen formulation services targeting pilling, white cast and breakouts, with full compliance with global regional regulations to help brands build high-reputation sunscreen products.