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With its pigment ink, the Uni-Ball Eye Fine UB-157 delivers a 0.5mm line width. Inside the barrel, a Uni-Flow system regulates pressure for consistent red ink output. Permanent marks from this 13g rollerball pen resist water and chemical washing.
Key Features
- Uni Super Ink: Pigment-based formula bonds with paper to resist water and UV. Writing survives heavy humidity without fading or blurring.
- Uni-Flow System: Pressure-controlled reservoir regulates liquid ink delivery to the stainless tip. Lines stay consistent from start to finish without blotting.
- Tungsten Carbide Ball: 0.7mm stainless steel tip generates a precise 0.5mm line width. Hardened materials maintain shape despite high writing pressure.
- Polypropylene Barrel: 13.8cm frame includes an integrated transparent ink tracking window. Users monitor remaining ink levels to prevent unexpected depletion.
Frequently Asked Questions
Is Uni-Ball UB-157 waterproof?
The Uni Super Ink uses a pigment-based formula that resists water. Writing remains legible even if the paper gets wet.
Is Uni-Ball UB-157 refillable?
No, the UB-157 uses a disposable liquid ink system. The sealed reservoir prevents leaks but don't allow for refilling.
