Close-up of white fabric or sculpture against a blurred blue water background.

Korea Mulberry fiber

DAK FIBER

Mulberry-based Dak fiber, the origin of Korea traditional paper Hanji.
Engineered into textile-grade yarn while preserving its natural performance.

Traditional Korean hanok house with a curved tiled roof, surrounded by a landscaped garden with stone pathways, potted jars, and a small pond.

In traditional Korean living, Hanji was more than just paper—it was an essential material shaping everyday spaces.


Developed to withstand Korea’s distinct four seasons and significant changes in temperature and humidity, its durability and functionality have been proven over time.


Used in windows, flooring, and interiors, it reflects a lifestyle deeply connected to nature.

A shoji-style window with a lattice grid, allowing sunlight to pass through and cast shadows inside.

Hanji features a porous, fiber-rich structure that provides excellent breathability and moisture regulation.
Containing natural lignin, it resists pests and offers inherent antibacterial properties (up to 99.9%) without chemical treatment.

Close-up view of a textured, illuminated, folded-paper or fabric surface with a warm yellow glow.

Hanji features a porous, fiber-rich structure that provides excellent breathability and moisture regulation.
Containing natural lignin, it resists pests and offers inherent antibacterial properties (up to 99.9%) without chemical treatment.

Where It's Used

Dak Fiber is developed for applications where natural antibacterial performance and breathability are critical requirements—without relying on chemical treatment.

Its structural properties make it particularly well-suited for:

  • Premium bedding covers and pillowcases for hospitality environments where hygiene standards are non-negotiable

  • Skin-contact layers in duvet covers and sleeping products targeting sensitive skin segments

  • High-end retail bedding lines where "chemical-free" and "natural origin" are core product claims

  • Private label programs for brands positioning in the wellness or eco-conscious sleep category

Dak Fiber is not a commodity material. It is developed for partners who require a differentiated material story backed by verified performance.

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ICTUS transforms mulberry-based Dak fiber—the raw material of traditional Hanji—into regenerated yarn through advanced material processing.
By re-engineering this heritage fiber into textile-grade form, we preserve its inherent properties while enhancing durability, structural stability, and usability for modern applications.

Unlike conventional methods that rely heavily on chemical finishing, our approach focuses on performance through fiber structure and construction.
This allows the material to maintain its natural breathability, moisture regulation, and antibacterial characteristics over time.

In addition, our production system is designed with sustainability at its core.
Up to 99% of wastewater is recovered and reused during processing, significantly reducing environmental impact while ensuring consistent and responsible manufacturing.