---
product_id: 635820281
title: "LOONENG Ruling Pen for Masking Fluid, Cross Hinged Ruling Pen for Cartography, Calligraphy, Fine Line Drawing, Suitable for Use with Masking Fluid, Drawing Ink, Indian Ink and Gouache"
brand: "looneng"
price: "R381"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/635820281-looneng-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen
store_origin: ZA
region: South Africa
---

# Perfect for masking fluid & inks Adjustable fine line precision Stainless steel durability LOONENG Ruling Pen for Masking Fluid, Cross Hinged Ruling Pen for Cartography, Calligraphy, Fine Line Drawing, Suitable for Use with Masking Fluid, Drawing Ink, Indian Ink and Gouache

**Brand:** looneng
**Price:** R381
**Availability:** ✅ In Stock

## Summary

> 🎨 Master every fine line—where precision meets artistry.

## Quick Answers

- **What is this?** LOONENG Ruling Pen for Masking Fluid, Cross Hinged Ruling Pen for Cartography, Calligraphy, Fine Line Drawing, Suitable for Use with Masking Fluid, Drawing Ink, Indian Ink and Gouache by looneng
- **How much does it cost?** R381 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/635820281-looneng-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen)

## Best For

- looneng enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Durable stainless steel nib and elastic construction resist rust and heavy use, ensuring longevity.
- • **Versatile Artistic Tool:** Ideal for calligraphy, cartography, technical drawing, and applying masking fluid with flawless control.
- • **Engineered for Precision:** Adjust line width effortlessly with the screw adjuster for ultra-fine, consistent strokes.
- • **Lightweight & Comfortable:** Thick plastic handle offers ergonomic grip for extended creative sessions without fatigue.
- • **Effortless Masking Mastery:** Create intricate masked details like grasses and branches that pop after painting—stand out in every artwork.

## Overview

The LOONENG Ruling Pen is a premium stainless steel drafting tool designed for professionals and creatives seeking precision in calligraphy, cartography, and fine line drawing. Featuring an adjustable screw for customizable line widths and compatibility with masking fluid, Indian ink, and gouache, it delivers durable, rust-resistant performance with a comfortable grip, making it essential for detailed artistic and technical work.

## Description

Ruling pen is a drawing instrument for drawing with ink, paint, or any fluid medium with the viscosity to flow. The two parts of the ruling pen tip hold ink or with other drawing fluids between them by capillary action. It enables precise rendering of thin lines, the line width can be adjusted by turning the screw which connects the jaws. For drawing of lines and borders in ink, watercolors and gouache, and can be used for applying masking fluid.

## Features

- DURABLE STAINLESS STEEL CONSTRUCTION: The ruling pens are crafted in stainless steel with elastic properties, a material that has excellent strength and durability and does not rust, being easy to clean and providing lightness, flexibility and accuracy in strokes. It has a thick plastic handle and durable stainless steel nib that can stand up to heavy use.
- PRECISION DRAFTING TOOL: This ruling pen is designed for fine line drawing, technical drawing, cartography and calligraphy. It can also be used for making fine lines and borders in Indian ink, gouache, drawing ink and art masking fluid. Excellent for line lines and drawing with ink or other liquids or thin colors.
- SUITABLE FOR USE WITH MASKING FLUID: Dip the ruling pen in the masking fluid and 'scratch' onto your paper, creating very fine lines that will be masked against the paint. Once you have painted your picture, you can remove the masking fluid to reveal very fine lines of unpainted areas on your paper. Great for grasses, small branches, rope, and other fine detail.
- SELECT THE WIDTH WITH THE SCREW ADJUSTER: This adjustable pen is ideal for applying masking fluid as well as for use with paint for creating fine details and lines. Adjust the width of the line required using the wheel then dip the pen into the masking fluid (or paint) then draw long, thin grasses.
- INSTRUCTIONS FOR USE OF RULING PEN: Adjust to your chosen line width, dip the ruling pen in your ink or alternatively masking fluid and draw onto the paper. It is possible to create very fine lines. If you use masking fluid, let it dry and paint your picture. Once your painting is dry remove the masking fluid to reveal the unpainted areas.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | LOONENG |
| Brand | LOONENG |
| Model number | RP23A002 |
| Product Dimensions | 14.99 x 0.76 x 1.14 cm; 9 g |
| Color | Black |
| Closure | Snap |
| Grip Type | Plastic |
| Material Type | Plastic |
| Number of Items | 1 |
| Size | 1 Count (Pack of 1) |
| Point Type | Fine |
| Line Size | 0_3mm |
| Ink Color | Black |
| Manufacturer Part Number | RP23A002 |
| Item Weight | 9 g |

## Product Details

- **Brand:** LOONENG
- **Writing instrument form:** Technical Pen
- **Colour:** Black
- **Ink colour:** Black
- **Age range (description):** Adult

## Images

![LOONENG Ruling Pen for Masking Fluid, Cross Hinged Ruling Pen for Cartography, Calligraphy, Fine Line Drawing, Suitable for Use with Masking Fluid, Drawing Ink, Indian Ink and Gouache - Image 1](https://m.media-amazon.com/images/I/41rdgesEy5L.jpg)

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**Shop now:** [https://www.desertcart.co.za/products/635820281-looneng-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen](https://www.desertcart.co.za/products/635820281-looneng-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-10*