News Letter



Hello from SUNJIN Beauty Science.
Have you struggled with formulations becoming heavier and maintaining low-viscosity O/W stability every time you increase UV filter loading to achieve higher SPF and PA ratings?
HYDROSOLA-EBD2X provides a clear solution to one of the biggest challenges in low-viscosity O/W formulations.
By enabling enhanced UV filter loading, HYDROSOLA-EBD2X supports a powerful broad-spectrum combination of 15% BEMT, 12% DHHB, and 10% EHT, delivering comprehensive protection against both UVA and UVB rays.

Built on a lamellar-structured, stable O/W system, it disperses lightly and refreshingly in water and makes it possible to formulate low-viscosity systems even with high UV filter concentrations.

From sun mists and sun serums to lotions, unlock greater formulation flexibility in sun care with HYDROSOLA-EBD2X.

“No Oil-Phase Dissolution Required” – Water-Dispersion Technology That Dramatically Simplifies Formulation

The complicated heating and oil-phase dissolution processes required for solid UV filters—long considered one of the biggest challenges in sun care formulation development—can now be completely eliminated.
HYDROSOLA-EBD2X is a Ready-to-Use O/W ingredient that encapsulates 37% UV filters within a stable sub-micron multilamellar structure of less than 1 μm, allowing it to be simply dispersed into the water phase.
It completely overcomes the heavy, greasy feel that has traditionally accompanied high-load UV filter formulations. By significantly reducing formulation complexity, HYDROSOLA-EBD2X enables the stable creation of lightweight, refreshing, low-viscosity sun serums, fluids, and even sun mists.
Unlock an entirely new level of formulation freedom with HYDROSOLA-EBD2X.

Seamless UV Protection – Ultra-Close Skin Coverage with Sub-1 μm Particles

The effectiveness of UV protection depends not only on the concentration of UV filters but also on how uniformly they are distributed across the skin.
Conventional large-particle emulsions tend to aggregate or spread unevenly on the skin surface, leaving microscopic gaps where UV radiation can penetrate.
In contrast, HYDROSOLA's phospholipid-based sub-micron multilamellar structure, with particles smaller than 1 μm, closely follows the contours of the skin and adheres seamlessly to its surface, enabling UV filters to be applied finely and uniformly.
Experience more stable and efficient sun protection through the superior, even coverage created by these ultra-fine particles.

Light and Reassuring – A Refreshing Multilamellar Barrier with Minimal Concern About Skin Penetration

The sunscreen I apply every day—what if its ingredients are absorbed deep into my skin?"
Concerns regarding the skin absorption of organic UV filters have long been a source of anxiety in the sun care market. However, HYDROSOLA's robust multilamellar technology securely encapsulates UV filters within its structure, minimizing the potential for the ingredients to penetrate into the skin. In addition, its precisely engineered structure prevents oils from remaining on the skin surface, reducing the sticky feel often associated with sun care formulations and delivering a light, refreshing sensory experience. Discover reassuring barrier sun care with HYDROSOLA—designed to provide seamless UV protection on the skin's surface while keeping the skin feeling fresh, comfortable, and protected.

Skin absorption test by Franz diffusion cell

Less sticky, less glossy

High-Load UV Filters, New Possibilities for Low-Viscosity Sun Care : Perfect Fin-Mist Spraying Enabled by Interfacial Stability

Traditionally, high-load sunscreen formulations have been difficult to transform into low-viscosity formats such as mists because lowering the viscosity often compromises emulsion stability.
However, HYDROSOLA-EBD2X makes low-viscosity formulations easy to achieve without any heating process. Its robust lamellar structure surrounds and stabilizes the emulsion droplets, effectively resolving the interfacial instability typically associated with low-viscosity systems.
As a result, upon spraying, the formulation breaks into fine, uniform droplets that disperse smoothly through the air without aggregation. The result is a premium mist experience with even application and excellent sensory performance.
Create the perfect fine-mist sunscreen that delivers high-load UV filters lightly and evenly onto the skin without concerns about pump clogging or phase separation. With HYDROSOLA-EBD2X, a new generation of premium sun mist formulations becomes possible.

Formulation 1: Sun Mist

SUNJIN Beauty Science Booth Information

📍 Location: Hall D, COEX, Seoul
📍 Booth No : D-G30
📅 Exhibition Period: July 1 (Wed) – July 3 (Fri), 2026
By visiting the SUNJIN Beauty Science booth, you can experience and test the ingredients introduced in this newsletter firsthand and consult with our formulation experts. Pre-booked meetings are available without waiting. As we expect a large number of visitors during the exhibition, the venue may be quite busy. Researchers seeking in-depth technical discussions or formulation consultations are encouraged to schedule a meeting in advance. Visitors who attend a pre-arranged meeting will receive a special gift prepared by SUNJIN Beauty Science on a first-come, first-served basis. Your trusted partner in innovative formulation development, SUNJIN Beauty Science, looks forward to welcoming you at Booth D-G30.

[Technical Q&A] HYDROSOLA: Researchers Ask, SUNJIN Answers

Q1. Is there any difference in UV protection performance or formulation stability between using HYDROSOLA in the water phase and directly incorporating the same net amount (%) of UV filters into a conventional oil phase?
A: Yes, there is. In fact, when 25% HYDROSOLA-AOC was incorporated into a sun serum formulation, both in-vitro and in-vivo studies demonstrated superior UV protection performance compared with a formulation containing the same net concentration (%) of UV filters directly dissolved in a conventional oil phase. Furthermore, in long-term stability evaluations, the formulation containing HYDROSOLA also exhibited better overall stability than the conventional oil-based formulation.

HYDROSOLA @ Airy Sun Serum SPF/PA (In-vitro, vivo)

Stability Test of the Formula @Turbiscan

These results are believed to be attributable to HYDROSOLA's stable dispersion as submicron multilamellar droplets smaller than 1 μm within the formulation. Upon application to the skin, these fine multilamellar particles distribute more uniformly across the skin surface, enhancing the coverage and dispersion efficiency of the UV filters and, consequently, improving UV protection performance.
In contrast, when the same UV filters are incorporated directly into a conventional oil phase, relatively larger emulsion droplets (>1 μm) tend to form. These larger droplets may result in less uniform distribution on the skin surface, potentially reducing UV protection efficiency.
Furthermore, the increase in particle size can lead to greater aggregation and physical instability, making such systems less favorable in terms of formulation stability compared with formulations utilizing HYDROSOLA.

Q2. Organic sunscreens can sometimes leave yellow stains on clothing. Does a sunscreen formulated with HYDROSOLA reduce this issue?
A: Product transfer from the skin to clothing can still occur with sunscreens formulated using HYDROSOLA. However, there is a notable difference in how the UV filters interact with fabric.

In conventional macroemulsion systems, colored UV filters are present in the oil phase and can directly penetrate fabric fibers, potentially leaving yellow stains. In contrast, with HYDROSOLA, the UV filters are stably encapsulated within its multilamellar structure, which may relatively limit their direct interaction with textile fibers, even when the product transfers onto clothing. As a result, residues are generally easier to remove by washing with water. The comparative test results below demonstrate the differences in fabric residue and washability between HYDROSOLA and conventional formulations containing the same concentration of UV filters.

Q3. Are there any recommended formulation conditions when using HYDROSOLA?
A: To maximize the performance and stability of HYDROSOLA, we recommend the following formulation conditions

* Recommended pH range: pH 5.0 ~ 7.5
* Recommended addition temperature and stage: Post-addition at 40–45°C after emulsification
* Cold process compatibility: HYDROSOLA disperses easily even at room temperature, making it suitable for cold-process formulations.

HYDROSOLA features a phospholipid (lecithin)-based encapsulation structure. Therefore, prolonged exposure to high temperatures or continuous application of strong shear forces may partially disrupt the lamellar structure or cause particle aggregation. For this reason, the most recommended approach is to add HYDROSOLA after the emulsification and cooling processes, at approximately 40–45°C. That said, HYDROSOLA is relatively stable under the temperatures typically encountered during standard cosmetic manufacturing processes. As long as it is not maintained at elevated temperatures for an extended period, it is considered to be applicable at temperatures of up to approximately 70°C.

---