---
product_id: 369795105
title: "Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker"
brand: "uni japan"
price: "AR$31798"
currency: ARS
in_stock: true
reviews_count: 8
category: "Uni Japan"
url: https://www.desertcart.com.ar/products/369795105-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0
store_origin: AR
region: Argentina
---

# Ergonomic rubber grip for all-day comfort Blue Black gel ink for crisp writing 0.28mm ultra micro point Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker

**Brand:** uni japan
**Price:** AR$31798
**Availability:** ✅ In Stock

## Summary

> 🖋️ Write sharp, work smart, and own your desk style.

## Quick Answers

- **What is this?** Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker by uni japan
- **How much does it cost?** AR$31798 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/369795105-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0)

## Best For

- uni japan enthusiasts

## Why This Product

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

## Key Features

- • **Comfort Meets Control:** Renewed 2021 rubber grip design offers ergonomic support, reducing hand fatigue during marathon brainstorming sessions.
- • **Sleek Retractable Design:** Retractable mechanism with cushioned rubber tip doubles as a touchscreen stylus—perfect for the hybrid work lifestyle.
- • **Subtle Statement of Style:** Elegant Pink Gold accents and a unique Kanji LOVE sticker make this pen a conversation starter and a symbol of refined taste.
- • **Precision at Your Fingertips:** Ultra micro 0.28mm tip delivers razor-sharp, professional lines that elevate your notes and sketches.
- • **Smooth, Smudge-Resistant Ink:** Premium Blue Black gel ink ensures vibrant, clean writing that stands out in meetings and presentations.

## Overview

The Signo RT1 Retractable Gel Ink Pen features an ultra-fine 0.28mm tip with smooth Blue Black gel ink, housed in a sleek retractable body with a renewed ergonomic rubber grip. Designed by Uni Japan, it combines precision, comfort, and style, including a touchscreen-compatible cushioned tip and a distinctive Kanji LOVE barrel print, making it the perfect pen for professionals who demand both performance and panache.

## Description

Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker Renewal! An ultra-fine 0.28mm retractable gel ink ballpoint pen that can write smoothly. Very fine but smooth. By eliminating the corners of the tip and the signo ink of the new formulation, the frictional resistance between the pen tip and the paper is reduced, and a smooth writing taste is realized. It is a one-motion design in which the joint between the grip and the shaft is inconspicuous. Edgeless tip with no corner at the tip of the tip To reduce the frictional resistance between the pen tip and the paper, the corners at the tip of the tip have been eliminated to achieve a smooth writing feel. Moreover, the stainless steel tip excellent in toughness and the spring tip mechanism which prevents the direct current of ink are adopted. Smooth new compound ink By reviewing the ink composition, we have improved the smoothness while maintaining the vividness of the ink color and the feature of being able to draw ultra-fine lines without bleeding. Uses a dark, non-bleeding water-based pigment ink. It also has excellent water resistance and light resistance. Flowing one-motion design A new design with no noticeable joint between the grip and the shaft. The simple, smooth and flowing shape is attractive. In addition, the entire toe shaft has a rubber grip that is easy to grip.

Review: From a pen junkie - love it - I’m one of those hopeless believers that if I just find the right pen, my handwriting will be beautiful. This has resulted in me owning MANY pens. From 0.28mm to 1.0mm, roller to fountain, I have WAY too many. But out of all the brands I keep going back to oniball. They’re always smooth, good ink quality (no skipping), last long, I mean you can leave them in a closet for 3 years and they start right back up! I think I saw someone using this one on YouTube & had to try it. The smaller the nib the better I write in my journal so had to try a 0.28mm uniball. It was everything the 207 signo 0.7mm, with tinier lines! I like the design, the straight lines is more comfortable to me. Very lightweight. And reliable - just like all uniball pens I own. Very pleased, this is the smoothest 0.28mm I’ve ever used!!!
Review: WOW - Sharp! - This is my first experience with an Ultra Fine tip pen, it has a good feel in the hand, it writes a "thin line", and I've NOT had ANY "blobbing" of the ink on the paper while writing. If you need to make really small "informational notes" on documents, or in your Bible, THIS is a great pen for you. The 0.28mm point is Ultra Fine and allows for very small, but legible, while writing in between lines or in the margins. My normal use pen is a 0.38mm (Very Fine), but still too broad of a line for really small lettering (regular "Fine" pens are 0.5mm or 0.7mm).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09JNXGZ3Y |
| Additional Features | Retractable |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Body Shape | Round |
| Brand | Uni Japan |
| Brand Name | Uni Japan |
| Closure Type | Retractable |
| Color | Blue |
| Customer Reviews | 4.6 out of 5 stars 95 Reviews |
| Drill Point | Ultra Fine |
| Grip Type | rubber |
| Hand Orientation | Ambidextrous |
| Included Components | 3 Uni Japan Signo RT1 Retractable Gel Ink Pens, 1 Kanji LOVE Sticker |
| Ink Base | Water |
| Ink Color | Black,Blue,Red |
| Item Diameter | 11 Millimeters |
| Item Dimensions | 2.76 x 6.1 x 0.39 inches |
| Item Weight | 0.04 Kilograms |
| Line Size | 0.28mm |
| Manufacturer | Uni Japan |
| Material | Acrylonitrile Butadiene Styrene, Alloy Steel, Resin, Rubber |
| Material Type | Acrylonitrile Butadiene Styrene, Alloy Steel, Resin, Rubber |
| Model Number | UMN155N28.64X3 |
| Recommended Uses For Product | Writing |
| Style | modern |
| Theme | Love |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
| Writing Instrument Form | Ballpoint Pen |

## Product Details

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

## Images

![Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker - Image 1](https://m.media-amazon.com/images/I/51wSQBgAMeL.jpg)
![Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker - Image 2](https://m.media-amazon.com/images/I/41Ziwu0IdLL.jpg)
![Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker - Image 3](https://m.media-amazon.com/images/I/41Ysk+NGlmL.jpg)
![Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker - Image 4](https://m.media-amazon.com/images/I/71zr15KK48L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ From a pen junkie - love it
*by E***S on October 2, 2025*

I’m one of those hopeless believers that if I just find the right pen, my handwriting will be beautiful. This has resulted in me owning MANY pens. From 0.28mm to 1.0mm, roller to fountain, I have WAY too many. But out of all the brands I keep going back to oniball. They’re always smooth, good ink quality (no skipping), last long, I mean you can leave them in a closet for 3 years and they start right back up! I think I saw someone using this one on YouTube & had to try it. The smaller the nib the better I write in my journal so had to try a 0.28mm uniball. It was everything the 207 signo 0.7mm, with tinier lines! I like the design, the straight lines is more comfortable to me. Very lightweight. And reliable - just like all uniball pens I own. Very pleased, this is the smoothest 0.28mm I’ve ever used!!!

### ⭐⭐⭐⭐⭐ WOW - Sharp!
*by T***R on July 10, 2025*

This is my first experience with an Ultra Fine tip pen, it has a good feel in the hand, it writes a "thin line", and I've NOT had ANY "blobbing" of the ink on the paper while writing. If you need to make really small "informational notes" on documents, or in your Bible, THIS is a great pen for you. The 0.28mm point is Ultra Fine and allows for very small, but legible, while writing in between lines or in the margins. My normal use pen is a 0.38mm (Very Fine), but still too broad of a line for really small lettering (regular "Fine" pens are 0.5mm or 0.7mm).

### ⭐⭐⭐⭐⭐ Awesome pens
*by K***K on August 11, 2025*

The pens are awesome, they are one of my favorite pens. The grip is nice, ink color is nice.

## Frequently Bought Together

- Uni Japan Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Renewal 2021 Rubber Grip, Blue Black 3 Pens With Kanji LOVE Sticker
- 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 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, UMN-155-28, 10 Color Value Set

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-18*