News Letter

At the summit of Mt. Taebaek, amid subzero temperatures and cutting winds, we encountered rime ice—a naturally occurring structure formed by one-directional growth. This phenomenon prompted an important question:

"Why does nature, under extreme conditions, favor rod-shaped growth in a single direction rather than a spherical form?”

Below is an image of rime ice captured during a winter hike on Mt. Taebaek in 2021.

While most rime ice spreads and grows in all directions, the formations at the summit of Mt. Taebaek grew elongated in one dominant direction.

This natural principle is remarkably reflected in the structure of rod-shaped zinc oxide—successfully commercialized exclusively by Sunjin Beauty Science.

As shown above, realizing a rod-shaped structure demands precise control of crystal growth in one direction only. Although similar approaches have been described in academic studies, they were traditionally regarded as unsuitable for large-scale commercial production.

So, what are the advantages of rod-shaped zinc oxide?

Conventional particles with a spheroidal shape tend to aggregate easily, forming larger clusters. As a result, they may spread unevenly on the skin and lead to a stiff or less pleasant sensory feel.

In contrast, rod-shaped particles spread into a mesh-like structure, delivering wide and uniform skin coverage.

This structural advantage delivers a smoother skin feel, superior transparency, and enhanced UV protection efficiency through broad, uniform coverage.

Rod-shaped Zinc Oxide is a next-generation UV filter that delivers high performance through its distinctive structural design.

For inquiries regarding rod-shaped zinc oxide and related products, please contact us below.

Areum Jeong / Regional Sales Manager

E-mail : sales1@sunjinbs.com