The UMR-38S is the 038 mm refill that is sold with the Uni-ball One gel pen.
This pigmented refill is designed to offer a darker, more legible color than a standard gel ink. It uses pigmented to create the base of the color where a more standard gel ink uses dye.
The refill retails for 100 JPY or about $1.00.
When included with the Uni-ball One pen the refill is sold in Black, red, blue, yellow, orange, green, pink, sky blue, light pink, blue black, royal blue, light blue, mandarin orange, lime green, emerald, baby pink, violet, brown black, Bordeaux black, and green black. When sold in a stand-alone refill, the UMR-38S simply sold in black, blue, and red.
The 0.38 mm version of this refill is available in 20 colors while the 0.5 mm one has just 10.
Uni UMR-38S Pigmented Ink Refill Information
| Street Price | Check Price |
| Manufacturer | Uni |
| Pen Type | Rollerball / Gel |
| Rating | |
| Sizes | 0.38 mm |
| Ink Colors | Blue, Black, Red |
| Acid-Free? | No |
| Erasable? | No |
| Pressurized? | No |
| Archival? | No |
| Fade Resistant? | No |
| Fraud Prevention? | No |
| Quick Drying? | No |
| Non-toxic? | No |
| Water-resistant? Waterproof? | No |
| Ink Base | Pigmented |
| Tip Shape | Conical |
| Tip Material | Metal |
| Refill Standard | Proprietary |
| Quantity Sold | 1 |
| Similar Refills: |