---
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: "₱618"
currency: PHP
in_stock: true
reviews_count: 13
category: "Liquidraw"
url: https://www.desertcart.ph/products/50823408-liquidraw-technical-pen-red-ink-25-ml-waterproof-drawing-ink
store_origin: PH
region: Philippines
---

# 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:** ₱618
**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?** ₱618 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/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

Product Description

Review: Good ink - As advertised and reasonable price
Review: Quality ink and bottle - tips on opening bottle. - I used this to refill my Reform Refograph 0.35, a pen I have used for over 30 years. The ink runs smoothly and dries quickly, which is the most important fact. The bottle requires a little patience to open but I don't think this is because it is poor quality but because it is good quality. Here are my tips, which result in no spill or mess at all. Once you screw off the black cap and then lift off (not screw off) the clear plastic nozel cap you will find that the nozzle is solid down to the ink level. I found what works is to take a thin nail (which has a pointed end) - the bronze looking type you lightly tap in the wall to put up picture frames and just lightly tap it down into the nozzle. If you do this gently the nail will eventually pierce through to the ink effortlessly. Then you gently lift the nail out, wash the nail and put the clear nozel cap back on and screw back on the black cap. The nozel will now work perfectly and you will have a nice clean small hole into the bottle through the nozel, which will help avoid clogs. If you use a paper clip (which has a flat head), you will quickly find it difficult and then you will start applying too much pressure and then pop all the ink will spray out and you will be left with a mess and a screwed up nozzle. Hope this helps. Small bronze nail, gently tap tap in with hammer into the nozzle and then gently remove.

## 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 |
|---------------|-------|
| ASIN | B07289WPMP |
| Best Sellers Rank | 19,883 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 19 in Bottled Ink |
| Brand | Liquidraw |
| Brand Name | Liquidraw |
| Container Type | Bottle |
| Country Of Origin | India |
| Customer Reviews | 4.4 out of 5 stars 376 Reviews |
| Ink Colour | Blue,Pink,Red,Black |
| Item Volume | 25 Millilitres |
| Item volume | 25 Millilitres |
| Manufacturer | Liquidraw |
| Manufacturer Part Number | NK100 - RD |
| Number of Items | 1 |
| Number of items | 1 |
| Package information | Bottle |
| Paint Type | Watercolour |
| Paint type | Watercolour |

## Product Details

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

## 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)
![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 2](https://m.media-amazon.com/images/I/712izZUDfgL.jpg)
![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 3](https://m.media-amazon.com/images/I/819Av3+PxFL.jpg)

## Available Options

This product comes in different **Style** 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

### ⭐⭐⭐⭐⭐ Good ink
*by M***. on 6 May 2026*

As advertised and reasonable price

### ⭐⭐⭐⭐⭐ Quality ink and bottle - tips on opening bottle.
*by J***D on 18 November 2020*

I used this to refill my Reform Refograph 0.35, a pen I have used for over 30 years. The ink runs smoothly and dries quickly, which is the most important fact. The bottle requires a little patience to open but I don't think this is because it is poor quality but because it is good quality. Here are my tips, which result in no spill or mess at all. Once you screw off the black cap and then lift off (not screw off) the clear plastic nozel cap you will find that the nozzle is solid down to the ink level. I found what works is to take a thin nail (which has a pointed end) - the bronze looking type you lightly tap in the wall to put up picture frames and just lightly tap it down into the nozzle. If you do this gently the nail will eventually pierce through to the ink effortlessly. Then you gently lift the nail out, wash the nail and put the clear nozel cap back on and screw back on the black cap. The nozel will now work perfectly and you will have a nice clean small hole into the bottle through the nozel, which will help avoid clogs. If you use a paper clip (which has a flat head), you will quickly find it difficult and then you will start applying too much pressure and then pop all the ink will spray out and you will be left with a mess and a screwed up nozzle. Hope this helps. Small bronze nail, gently tap tap in with hammer into the nozzle and then gently remove.

### ⭐⭐⭐⭐ The ink is good - bottle less so
*by A***R on 21 September 2019*

I'm not a professional draughtsman so can't really vouch for the ink quality. It's black and writes OK on paper is all I can say. Only issue I had was with the bottle. Really wish I'd kept my last Rotring one and transferred the ink. The nozzle was solid so had to poke a hole down it. Always seem to end up covered in ink when refilling now - not quite sure how it happens but fortunately it seems to wash off very easily. Having said that it seems relatively waterproof once dried (in paper anyway). Works fine in my 0.25 Isograph and hasn't blocked at all so far.

## 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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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-06-06*