"No mess. "Uni" Sharp Refill, Adhesive Lead to Keep Notes Clean and Scratch-Resistant.

Product Features
■ Crisp and deep but not easy to stain (Smudge proof method)
The unique formula allows the core to adhere to the paper surface. It allows you to write crisp, dark text and is scratch resistant to keep your writing notes looking good.
This sharp lead is perfect for making notebooks that you want to return and reply because it reduces the mess of paper from scraping to paper or contact with your hands.
*About Smudge Proof Formula
Formulated with a unique ingredient, this is a manufacturing method to produce a core, which suppresses contamination by making the wick powder close to the paper surface.
Named from Smudge-Proof, which means it is scratch resistant and smearproof. The features of the traditional "strong", "deep" and "smooth" are also added to the "stain resistant" feature.
■ Does not bleed through even when drawing a marker
Even when you draw highlighters or other markers, it prevents the spread of the wick so it won't bleed through and leaves the paper smear. It also reduces soiling caused by the wick powder adhering to the tip of the marker.
■Simple design case
Adopts an opaque matte texture that does not show the contents of the product. This is a simple and timeless case with an off-white design that fits in your living space regardless of the diameter of the core.
The center of the case is a circular indentation for visual accent, while also allowing you to slide it open and close the case.
■ Slide case allows for easy removal of lead
Simple slide operation opens and closes for smooth lead retrieval

The powder spread after writing is defined as dirt on the surface of the paper. Up to 50% less stain than conventional products under certain conditions. Dirt suppression results may differ due to differences in core diameter, hardness, paper type, writing load and other conditions.
There may be differences in stain control due to the amount of sebum and water intensity, and weak contact.