---
product_id: 50823408
title: "Liquidraw Technical Pen Red Ink – 25 ml | Waterproof Drawing Ink | Compatible with Rotring Isograph Pens | Plastic Refill Bottle, Screw-On Lid | Ideal for Illustration, Calligraphy & Drawing"
brand: "liquidraw"
price: "A$10"
currency: AUD
in_stock: true
reviews_count: 4
url: https://www.desertcart.com.au/products/50823408-liquidraw-technical-pen-red-ink-25-ml-waterproof-drawing-ink
store_origin: AU
region: Australia
---

# Waterproof & smudge-resistant Rotring Isograph compatible refill 25 ml precision ink volume Liquidraw Technical Pen Red Ink – 25 ml | Waterproof Drawing Ink | Compatible with Rotring Isograph Pens | Plastic Refill Bottle, Screw-On Lid | Ideal for Illustration, Calligraphy & Drawing

**Brand:** liquidraw
**Price:** A$10
**Availability:** ✅ In Stock

## Summary

> 🖌️ Ink that keeps your ideas flowing—bold, precise, and waterproof.

## Quick Answers

- **What is this?** Liquidraw Technical Pen Red Ink – 25 ml | Waterproof Drawing Ink | Compatible with Rotring Isograph Pens | Plastic Refill Bottle, Screw-On Lid | Ideal for Illustration, Calligraphy & Drawing by liquidraw
- **How much does it cost?** A$10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/50823408-liquidraw-technical-pen-red-ink-25-ml-waterproof-drawing-ink)

## Best For

- liquidraw enthusiasts

## Why This Product

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

## Key Features

- • **Mess-Free Refilling:** Ergonomic screw-on lid and plastic bottle ensure clean, controlled ink refills every time.
- • **Trusted by Creatives:** Ideal for illustrators, architects, designers, and calligraphy pros demanding consistent quality.
- • **Vibrant Red Precision:** Bold, high-contrast red ink perfect for fine lines and technical drafting.
- • **Permanent & Waterproof:** Ink dries quickly to a smudge-proof, bleed-resistant finish for lasting artwork and notes.
- • **Seamless Pen Compatibility:** Specifically formulated for smooth flow in Rotring Isograph and other refillable pens.

## Overview

Liquidraw Technical Pen Red Ink offers 25 ml of vibrant, waterproof red ink designed for technical pens like Rotring Isograph. Its smudge-resistant formula ensures crisp, permanent lines ideal for illustration, calligraphy, and detailed drawing. The sturdy plastic refill bottle with a screw-on lid provides a mess-free refill experience, making it a reliable choice for professionals and creatives seeking consistent, high-quality ink performance.

## Description



## Features

- STRIKING COLOUR: This 25 ml bottled ink delivers a bold red tone designed for clear, high-contrast drawing, writing & illustration; ideal for fine line work, sketching & technical drafting
- ISOGRAPH-COMPATIBLE: Formulated for smooth flow in Rotring Isograph technical pens, dip pens & other refillable drawing pens; easily refill your pen without needing cartridges or disposables
- WATERPROOF & SMUDGE-RESISTANT: Once dry, the waterproof ink helps prevent bleeding or smearing on paper, supporting crisp, permanent results in precise technical art & calligraphy
- SUITABLE FOR ARTISTS & DESIGNERS: A reliable choice for illustrators, architects, designers, experts, art students & anyone who needs consistent ink performance for technical drawing, calligraphy or detailed lines
- EASY REFILL BOTTLE: The sturdy plastic bottle with screw-on lid keeps your ink secure between uses; designed for smooth, controlled refilling to minimise mess & support continuous creative work

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Liquidraw |
| Brand | Liquidraw |
| Colour | red |
| Number of Items | 1 |
| Size | 25 ml |
| Ink Colour | Blue,Pink,Red,Black |
| Manufacturer Part Number | NK100 - RD |

## Product Details

- **Brand:** Liquidraw
- **Package information:** Bottle
- **Paint type:** Watercolour
- **Item volume:** 25 Millilitres
- **Manufacturer:** Liquidraw

## Images

![Liquidraw Technical Pen Red Ink – 25 ml | Waterproof Drawing Ink | Compatible with Rotring Isograph Pens | Plastic Refill Bottle, Screw-On Lid | Ideal for Illustration, Calligraphy & Drawing - Image 1](https://m.media-amazon.com/images/I/71G3fsYkvOL.jpg)

## Available Options

This product comes in different **Style Name** options.

## Questions & Answers

**Q: Hi, can this be used with stamps/rollers? Thanks**
A: Sorry, I haven't a clue about that, I only uses the ink in rotring rapidograph and isograph pens.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works very well in my marker
*by C***  on 22 September 2023*

I tried it in my golf ball marker, and it works well, good value for money.

### ⭐⭐⭐⭐⭐ Great Quality ,  Arrived Early and Well Priced.
*by C***M on 10 February 2019*

These inks work great in Isograph pens for writing and have served me well for my note taking, My order arrived before the expected date and was well packaged.The ink itself (I ordered red and green) is great it has a deep pigment with no noticable fading it and drys quickly which is perfect for drawing or writing alike.The only issue I had is the pen my clog or not write as well with this ink if it has been left for a few days without writing. (however this may be an issue with the pen itself and not the ink but it is easily resolved by scribbling on some scrap paper until the flow is normal)

### ⭐⭐⭐⭐⭐ Five Stars
*by C***E on 2 December 2017*

Very good, dense and free flowing. Does not clog my Isograph Pens. Rapid delivery too.

## Frequently Bought Together

- Technoart Waterproof Drawing Ink, Red, 25ml (Bottle), Compatible with Rotring Isograph Pens
- Technical Pen Waterproof Drawing Ink BLUE 25ml (Compatible with Rotring Isograph Pens)
- Technical Pen Waterproof Drawing Ink GREEN 25ml (Compatible with Rotring Isograph Pens)

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**Shop now:** [https://www.desertcart.com.au/products/50823408-liquidraw-technical-pen-red-ink-25-ml-waterproof-drawing-ink](https://www.desertcart.com.au/products/50823408-liquidraw-technical-pen-red-ink-25-ml-waterproof-drawing-ink)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-24*