---
product_id: 633395772
title: "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: "58.44 DT"
currency: TND
in_stock: false
reviews_count: 13
category: "Looneng"
url: https://www.desertcart.tn/products/633395772-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen-cartography
store_origin: TN
region: Tunisia
---

# Precision adjustable line width Flawless fluid flow & easy clean Stainless steel durability 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:** 58.44 DT
**Availability:** ❌ Out of Stock

## Summary

> 🎨 Master every line, mask every detail — precision meets durability in your creative arsenal!

## Quick Answers

- **What is this?** 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?** 58.44 DT with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/633395772-ruling-pen-for-masking-fluid-cross-hinged-ruling-pen-cartography)

## 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:** Rust-proof stainless steel nib and sturdy plastic handle withstand heavy use without fatigue.
- • **Effortless Maintenance:** Quick, residue-free cleaning keeps your pen ready for the next masterpiece—no brush needed.
- • **Flawless Fluid Control:** Holds ample masking fluid or ink, enabling multiple fine lines before re-dipping—speed up your workflow.
- • **Versatile Artistic Tool:** Perfect for calligraphy, cartography, fine line drawing, and masking fluid applications with various inks and paints.
- • **Engineered for Precision:** Adjust line width effortlessly with the screw wheel for ultra-fine to bold strokes.

## Overview

The LOONENG Ruling Pen is a premium stainless steel drafting tool designed for professionals and enthusiasts in calligraphy, cartography, and fine line art. Featuring an adjustable screw for precise line width control, it excels in applying masking fluid and inks like Indian ink and gouache. Lightweight yet durable, it offers smooth fluid flow and easy cleaning, making it an indispensable tool for detailed, high-quality artwork.

## Description

Product description LOONENG Ruling Pen for Masking Fluid, Designed for Fine Line Drawing, Technical Drawings, Suitable for Use with Masking Fluid, Drawing Ink and Gouache 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. SELECT THE WIDTH WITH THE SCREW ADJUSTER The two parts of the tip hold ink or with other drawing fluids between them by capillary action. By adjusting the screw, you can carefully and very accurately adjust the width of the line you're creating. It is used to draw lines of precise thickness with ink. INSTRUCTIONS FOR USE OF RULING PEN Adjust to your chosen line width, dip the ruling pen in ink or 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. USED TO CREATE ACCURATE FINE LINES Ruling pen is designed for fine line drawing, calligraphy, and technical drawings. It can also make fine lines and borders in Indian ink, gouache, drawing ink, watercolors, and masking fluids. In addition, it is used to draw lines of precise thickness with paint or ink. Perfect for creating fine lines with masking fluid Once dry, you can paint watercolors and inks over the masking fluid, and then once the paint is dry remove the masking fluid to reveal very fine lines of the unpainted areas. Here Are Some Tips on How to Use a Ruling Pen Effectively Select the Width with the Screw Adjuster By adjusting the screw on the side, you can carefully and very accurately adjust the width of the line you're creating. It is used to draw lines of precise thickness with paint or ink. Scrape Ink with a Paintbrush for Control When loading ink, use a fine brush or a dropper is used to gently place the ink on the inside surface of the blade. The surface of the ruling pen is stained with ink and should be cleaned in time. Used to Draw Lines of Precise Thickness For technical drawing, for artists and architects. For applying mask fluid. For creating very fine lines that will be masked. For grasses, small branches, rope, and other fine details. Wiped Cleanly Remaining Ink After Use After use the pen, the remaining ink should be wiped cleanly, and the adjustment screw should be loosened to avoid the phenomenon of the deformation of the pen blade.

Review: Works perfectly with both masking fluid and paint, cleans easily - I used this both with masking fluid to mask some light reflections on cold-press watercolor paper that needed to be regular lines. Just dipped it in bottle, keeping masking fluid well below hinge piece and the screw wheel. Practiced a second to get the angle right for a nice line on a scrap piece. Once you get the angle, it flows smoothly, and the weight is nice and feels balanced in your hand. Lines are clean and smooth, and the tool holds way more fluid than I had expected. No trouble with drips, and the wheel is great for adjusting the width of line as well as for clean up. For clean up, I used just a barely damp paper towel (damp from wiping my brush after painting and dip rinsing in clear water), and you couldn't even tell it had been used. Tried it out with some watercolor paint from a palette well to smooth a line in places, and it worked like a dream. Again, just dipped, gently and quickly stroked outside once against clean edge of palette well. No drips, no need to put in with a brush, at least for me. Clean up still fast and easy no residue. Excellent product.
Review: It works better than anything I've used to apply resist for watercolor! - What I love: 1. It goes on smoothly 2. It adjusts between very fine lines for hair to thicker lines. 3. It cleans up completely and saves fine brushes. 4. The reservoir makes it possible to draw several fine lines before needing to dip again. This makes it quick so you can put the cap on in less time, therefore preventing the resist drying out. 5. I have only used this with Pebeo resist. I can't say it works as well using other products, because I haven't tied it with any other brands of resist. I am one happy girl! This reduced tons of frustration!

## 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 |
|---------------|-------|
| ASIN | B0CCPLTQ85 |
| Additional Features | Adjustable, Precision Drafting Tool, Suitable for use with Masking Fluid |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #8,861 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #118 in Drawing Pens |
| Body Shape | Round |
| Brand | LOONENG |
| Brand Name | LOONENG |
| Closure Type | Snap |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 2,252 Reviews |
| Drill Point | Fine |
| Grip Type | Plastic |
| Hand Orientation | Ambidextrous |
| Ink Base | Water |
| Ink Color | Black |
| Item Dimensions | 5.9 x 0.3 x 0.45 inches |
| Item Weight | 0.01 Kilograms |
| Line Size | 0_3mm |
| Manufacturer | LOONENG |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Model Name | RP23A002 |
| Model Number | RP23A002 |
| Recommended Uses For Product | fine line drawing, technical drawing, cartography, calligraphy, use with masking fluid, ink, gouache, and paint |
| Style | Cross Hinged |
| Unit Count | 1.0 Count |
| Warranty Description | None. |
| Water Resistance Level | Not Water Resistant |
| Writing Instrument Form | Technical Pen |
| Writing Technique | Technical Pen |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** LOONENG
- **Color:** Black
- **Ink Color:** Black
- **Writing Instrument Form:** Technical Pen

## Images

![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)
![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 2](https://m.media-amazon.com/images/I/61orBoSB83L.jpg)
![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 3](https://m.media-amazon.com/images/I/61WKSSvgQ3L.jpg)
![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 4](https://m.media-amazon.com/images/I/71ZeHy0zEJL.jpg)
![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 5](https://m.media-amazon.com/images/I/61McXzc1JkL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works perfectly with both masking fluid and paint, cleans easily
*by S***M on August 24, 2024*

I used this both with masking fluid to mask some light reflections on cold-press watercolor paper that needed to be regular lines. Just dipped it in bottle, keeping masking fluid well below hinge piece and the screw wheel. Practiced a second to get the angle right for a nice line on a scrap piece. Once you get the angle, it flows smoothly, and the weight is nice and feels balanced in your hand. Lines are clean and smooth, and the tool holds way more fluid than I had expected. No trouble with drips, and the wheel is great for adjusting the width of line as well as for clean up. For clean up, I used just a barely damp paper towel (damp from wiping my brush after painting and dip rinsing in clear water), and you couldn't even tell it had been used. Tried it out with some watercolor paint from a palette well to smooth a line in places, and it worked like a dream. Again, just dipped, gently and quickly stroked outside once against clean edge of palette well. No drips, no need to put in with a brush, at least for me. Clean up still fast and easy no residue. Excellent product.

### ⭐⭐⭐⭐⭐ It works better than anything I've used to apply resist for watercolor!
*by K***S on December 16, 2024*

What I love: 1. It goes on smoothly 2. It adjusts between very fine lines for hair to thicker lines. 3. It cleans up completely and saves fine brushes. 4. The reservoir makes it possible to draw several fine lines before needing to dip again. This makes it quick so you can put the cap on in less time, therefore preventing the resist drying out. 5. I have only used this with Pebeo resist. I can't say it works as well using other products, because I haven't tied it with any other brands of resist. I am one happy girl! This reduced tons of frustration!

### ⭐⭐⭐⭐⭐ Watercolor painting has just became easier
*by C***R on April 28, 2026*

I love this tool! If you having difficulties using masking fluid this tool will help you immensely, don't hesitate buy it now. It is so easy to use and clean up afterwards! Seems to be made very well and I love the way you can change your line thickness with just a quick twist of a little screw on the side of it. Came in quickly and it is definitely worth the money that I spent!

## Frequently Bought Together

- 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
- Pebeo Easy Peel Liquid Latex Masking Fluid - Drawing Gum - Dries Quickly - For Ink - Watercolor - Gouache Painting & Illustration - Fine Arts & Crafts Supplies - 45ml Bottle
- Crafter's Toolkit Glue and Residue Eraser, 0

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-30*