SUNJIN NEWSLETTER
[Silica Special III]
SH305: Light-Reflecting Silica for Soft Focus and SPF Boost
By Choi, Eunhee
Translated by Choi, Seolha
October 2025, NO.41
Silica has always played an “invisible yet essential role” in cosmetics.
But did you know?
Silica’s texture, spreadability, and even light reflection all vary depending on the surface treatment method.
The third star of our Silica Special series is SH305, which delivers unique functionality through its textured surface.
This ingredient not only provides a soft-focus effect that naturally blurs imperfections like pores and fine lines, but also acts as an SPF booster by reflecting light to enhance sun protection.
Let’s explore the exceptional features that SH305 has to offer.
What is the Soft Focus Effect?
Based on optical technology, it leverages light refraction and diffuse reflection to naturally conceal skin imperfections and gently even out skin tone.
The remarkable soft focus performance of SH305 comes from specialized processing that creates an optimally textured silica surface, which effectively disperses light. This light dispersion mechanism operates in much the same way within the UV range.
SH305’s fine silica particles disperse incoming UV rays in multiple directions across the skin’s surface, allowing sunscreen to work more effectively.
Ultimately, SH305 does more than create a soft-focus effect for flawless skin—it also serves as an SPF booster, adding new value through enhanced sun protection.
This performance has been confirmed in actual in-vivo studies. When SH305 is incorporated at 5%, SPF values more than double compared to the baseline, and this improvement is attributed to SH305’s unique dispersion mechanism rather than a simple additive effect.
With its irregularly textured micro-surface formed through specialized processing, SH305 disperses both light and UV rays from multiple angles. Meanwhile, its compact 2μm particle size ensures uniform distribution on the skin, optimizing the performance of UV-blocking actives.
In short, SH305 is an innovative material that addresses both the aesthetic desire for flawless skin (through soft focus) and the functional need for sun protection (as an SPF booster).
Moreover, SH305’s 100% silica composition ensures both safety and eco-friendliness, making it an ideal choice for clean beauty and sustainable cosmetic formulations.
Experience SH305 and our silica products at the Sunjin booth during in-cosmetics Asia, and discover how to develop innovative beauty products that deliver both performance and eco-conscious value.
For inquiries regarding our related products, please feel free to contact us at the details below.
Areum Jeong / Regional Sales Manager
E-mail : sales1@sunjinbs.com
