---
product_id: 399290712
title: "Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point (Blue Black)"
brand: "uni-ball"
price: "₩57542"
currency: KRW
in_stock: true
reviews_count: 7
url: https://www.desertcart.kr/products/399290712-signo-rt1-0-28mm-smooth-ink-flow-gel-pen-retractable
store_origin: KR
region: South Korea
---

# Quick-dry, water & light resistant ink Retractable with clip & rubber grip 0.28mm Ultra Micro Point Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point (Blue Black)

**Brand:** uni-ball
**Price:** ₩57542
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write Sharp, Stay Ahead: The Pen That Means Business

## Quick Answers

- **What is this?** Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point (Blue Black) by uni-ball
- **How much does it cost?** ₩57542 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/399290712-signo-rt1-0-28mm-smooth-ink-flow-gel-pen-retractable)

## Best For

- uni-ball enthusiasts

## Why This Product

- Trusted uni-ball brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Comfort Meets Control:** Ergonomic rubber grip and retractable design keep your hand fatigue-free during marathon writing sessions.
- • **Bonus Productivity Boost:** Includes a handy sticky notes set—perfect for organizing your ideas and staying ahead of the game.
- • **Precision at Your Fingertips:** Ultra-fine 0.28mm tip delivers crisp, detailed lines for flawless notes and artwork.
- • **Ink That Works as Hard as You Do:** Quick-drying, waterproof, and fade-resistant gel ink ensures your work stays sharp and smudge-free.
- • **Built to Last, Designed to Impress:** Durable stainless steel tip and leak-proof mechanism mean no interruptions, just smooth flow.

## Overview

The Uni-Ball Signo RT1 is a premium retractable gel pen featuring an ultra micro 0.28mm tip for precise writing and drawing. Its quick-drying, waterproof, and fade-resistant blue-black ink ensures clean, smudge-free documentation. Designed with a comfortable rubber grip and durable stainless steel tip, this pen offers reliable performance for professionals and creatives alike. The pack includes 10 pens plus a compact sticky notes set, making it an essential tool for organized, high-impact productivity.

## Description

✅ Uni-ball Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, 5-Pack, Sticky notes Value SetHave you been looking for the best gel pen? Then you are at the right place!This premium waterproof ink pen will give you only the best write-up. The smooth Pigment ink can be used for all your art works and it is a ballpoint pen with excellent water resistance and light resistance.This ink flow is good and the slipping of the pen tip is smooth. Ideal for fine designs because the writing taste is smooth and it can draw a straight line without distortion. It uses a high viscosity gel ink that will turn into a liquid as the ball rotates smoothly. As the ink dries quickly, you are safe with all your important documents and notes do not get dirty. This pigment ink is easy to dry and has little liquid dripping.✅ Main Characteristics: -Body Color: Blue Black -Body Material: Plastic -Retractable - Button -Clip Material: Plastic -Clippable -Diameter(Grip): 10.6mm -Diameter(Max): 10.9mm -Grip Color: Blue Black -Grip Material: Rubber -Ink Refillable: Yes -Length(Retracted): 14.1 cm / 5.6 inches -Ink Color: Blue Black -Tip Material: Metal -Tip Size: 0.28mm -Tip Type: Conical✅ Package includes: 10 x Uni-Ball Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen Rubber Grip, Blue Black Ink + 1 x Compact Sticky Notes.✅ What are you waiting for? Click Add to Cart and get yours now!

Review: Nurse Pens - This is THE pen for nursing documentation! Complies to color rules for legal documentation, including narcotic paperwork.
Review: Fine Lines - I love these pens. They have the click top that I love and the finest line. It writes clean and smooth!!

## Features

- 🖊 PREMIUM INK FLOW: This high quality ballpoint and gel ink is perfect for smooth and effortless drawing. This is the best Black gel pen set for artists, illustration sketching and adult coloring books. Uni-ball Signo RT1 does not have a corner at the tip of the tip, so you do not have to worry about the writing angle and your hands will not get tired.
- 🖊 EFFECTIVE USAGE: This quality signo gel pen does not fade and can be used for important documents. Since it is a quick-drying ink that penetrates quickly into the paper surface, there is no bleeding or show-through. It also has excellent water resistance and light resistance.
- 🖊 VERY FINE TIP GEL PENS: This durable black ink pen has a fine point tip suitable for any task, or writing meticulous notes, marking your calendar, etc. It has an Ultra Micro Point of 0.28mm. The ink dries quickly so there’s no bleeding or show-through! A rubber grip that is easy to use anywhere and easy to grip.In addition to its stylish design, it is a clip that is easy to pinch in your notebook.
- 🖊 ACID FREE AND NON TOXIC: This pen has a rubber grip for comfortable use. One unique thing about this pen is that it has more ink than any gel pen and sakura gelly roll pen. Durable design that does not break even if dropped and does not leak liquid. It uses a stainless steel tip with excellent toughness and a spring tip mechanism to prevent direct current ink.
- 🖊 100% SATISFACTION GUARANTEED: As a brand, we believe in quality! All our premium Uni-Ball Signo RT1 Very Fine Point Gel Pen are made for your full satisfaction or money back guaranteed.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08WK1CHRC |
| Best Sellers Rank | #97,190 in Office Products ( See Top 100 in Office Products ) #1,870 in Gel Ink Pens |
| Brand | Uni-Ball |
| Closure | Retractable |
| Color | Blue Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (46) |
| Date First Available | February 13, 2021 |
| Grip Type | Rubber |
| Ink Color | Blue Black |
| Item Weight | 4.2 ounces |
| Line Size | 0.28mm |
| Manufacturer | ACEPORTE |
| Manufacturer Part Number | UMN15528.64 |
| Material Type | Rubber |
| Number of Items | 1 |
| Package Dimensions | 5.75 x 2.64 x 1.06 inches |
| Point Type | Ultra Micro |
| Size | 11 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Uni-Ball
- **Color:** Blue Black
- **Ink Color:** Blue Black
- **Writing Instrument Form:** Ballpoint Pen

## Images

![Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point (Blue Black) - Image 1](https://m.media-amazon.com/images/I/6181+q5bh6S.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nurse Pens
*by M***T on March 9, 2024*

This is THE pen for nursing documentation! Complies to color rules for legal documentation, including narcotic paperwork.

### ⭐⭐⭐⭐⭐ Fine Lines
*by S***. on June 9, 2023*

I love these pens. They have the click top that I love and the finest line. It writes clean and smooth!!

### ⭐⭐⭐⭐ only issue is, it is not soft
*by N***N on June 14, 2023*

only issue is, it is not soft. Other than that no problem.

## Frequently Bought Together

- Uni-Ball Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point, Blue Black - Pack of 10, Sticky Notes Value Set
- Uni-ball Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5
- Uni-Ball Signo RT1 0.28mm - Smooth Ink Flow Gel pen, Retractable Gel Ink Pen, Ultra Micro Point, Black - Pack of 10, Sticky Notes Value Set

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**Shop now:** [https://www.desertcart.kr/products/399290712-signo-rt1-0-28mm-smooth-ink-flow-gel-pen-retractable](https://www.desertcart.kr/products/399290712-signo-rt1-0-28mm-smooth-ink-flow-gel-pen-retractable)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-27*