---
product_id: 1601133
title: "Lineco pH Testing Pen for Paper or Paperboard Products. | Easy to Test Paper for Acid, Turn Purple On Neutrality Papers"
brand: "lineco"
price: "11799CFA"
currency: XOF
in_stock: true
reviews_count: 13
category: "Lineco"
url: https://www.desertcart.sn/products/1601133-lineco-ph-testing-pen-for-paper-or-paperboard-products-easy
store_origin: SN
region: Senegal
---

# Accurate pH detection ≥6.8 Instant pH test in seconds Made in USA, trusted quality Lineco pH Testing Pen for Paper or Paperboard Products. | Easy to Test Paper for Acid, Turn Purple On Neutrality Papers

**Brand:** lineco
**Price:** 11799CFA
**Availability:** ✅ In Stock

## Summary

> 🖋️ Swipe Smart, Preserve Forever!

## Quick Answers

- **What is this?** Lineco pH Testing Pen for Paper or Paperboard Products. | Easy to Test Paper for Acid, Turn Purple On Neutrality Papers by lineco
- **How much does it cost?** 11799CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/1601133-lineco-ph-testing-pen-for-paper-or-paperboard-products-easy)

## Best For

- lineco enthusiasts

## Why This Product

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

## Key Features

- • **Precision pH Indicator:** Detects paper pH 6.8 and above to ensure longevity and prevent yellowing or brittleness.
- • **Instant Archival Assurance:** Quickly reveals if your paper is archival with a simple swipe—purple means preservation-ready.
- • **Effortless & Non-Destructive:** Test your paper without damage—just draw a line and watch the color change.
- • **Trusted American Craftsmanship:** Proudly made in the USA by Lineco, a leader in archival and framing supplies.
- • **Essential for Creatives & Collectors:** Stay ahead of paper degradation and protect your art, journals, and documents with confidence.

## Overview

The Lineco pH Testing Pen is a professional-grade, easy-to-use tool designed to instantly identify the alkalinity of paper and paperboard products. Made in the USA, it uses a chlorophenol red indicator that turns purple on archival-quality paper (pH 6.8+), helping artists, archivists, and managers ensure their materials will last for decades without yellowing or deterioration.

## Description

Lineco pH testing pen is an easy, convenient test pen to distinguish between alkaline paper and board, and acidic paper and board. The chlorophenol red indicator solution turns a definite purple color on any paper with a pH of 6.5 or higher.

Review: This really works on watercolor paper (I tested on acid paper, too) - I occasionally run across a new brand of watercolor or mixed media where the listing says it's acid-free, but the pad doesn't say anything about it. I wondered if there was a way to test the paper that didn't involve grinding it up and putting it in Ph neutral water, and in my searches, someone on a forum recommended this, the Lineco pH Testing Pen for Paper or Paperboard Products.. I ordered one immediately. When I opened it up, there was a label firmly stuck over the part that tells what color to look for, so I came back to the listing and noticed a reviewer said this was just a purple marker. So I did a test. I used the marker on 3 pads of watercolor paper. All three showed a purple mark, which is the sign the paper is Ph neutral. Then I took one of those sheets of paper and gently applied lemon juice across the surface. When it dried, I tried the maker on it - and got a clear line, which means the paper is "unsuitable" or acidic. So yes, this pen does work. It works if you want to test your paper for Ph to make sure it won't yellow, become brittle or cause ink, watercolors or pencil to fade over time. Good news for me is that the very nice paper I got recently that didn't say it was acid-free on the pad got a purple mark from the test pen. One of the older pads that claimed in the listing to be acid-free but not on the pad ended up with a clear mark. Super product.
Review: Works the same regardless of the pen’s tip color - I really love this pen. I have all kinds of journals, sketchbooks, loose papers, and cardstock that I enjoy using for journaling and this pen is a fantastic tool to check anything that isn’t labeled as acid-free or that one isn’t completely sure about. A simple swipe of the pen on the paper will reveal whether it’s acidic or not - the line left on the page will instantly appear purple for an alkaline pH or, alternatively, instantly turn clear/transparent or yellow for an acidic pH. When it arrived, I spent a fun evening going through stacks of journals and paper and checking everything. My pen arrived with a solid purple tip (some seem to have light tips out of the package) but the marks it left behind on the pages changed color appropriately depending on the pH of the paper. I tested the pen on known (labelled as such) acid-free sketchbooks, journals, papers, and cardstock from The Paper Studio (Hobby Lobby), Peter Pauper Press, Recollections from Michael’s, and a few other random things and then to test for acidity I also tested the pen on some Moonster journals and old, yellowed (some nearly tan) notepads and notebooks that are definitely acidic and aging. The pen’s mark changed color appropriately - purple for everything labelled as acid-free: sketchbooks, The Paper Studio, Peter Pauper Press, and Recollections and then yellow or clear/transparent for old and yellowing notepads, notebooks, and Moonster - even though the tip of the pen itself was solid purple. I saw that some people were concerned about the color of the pen’s tip upon opening the pen for the first time, so whether the tip on your pen is purple or light when it arrives it’ll work the same regardless. An essential tool to keep on hand for anyone with an eye towards acid-free and archival-quality materials!

## Features

- Basic Info: Material created and made in USA. Lineco is a leading and trusted brand for archival art, photography, and framing supplies
- Quick reflection: Shows within seconds if your paper products are archival. Clear or yellow line means bad - Purple line means archival
- Storage condition: Paper can be reasonably long-lived if its pH is 6.0 or higher, especially if it is well made and carefully used and stored. In order to last for centuries in today's polluted air, it must have an alkaline reserve and this usually means a pH of 7.0 or greater
- Easy to use: Simply draw a small line on the material you wish to test. The line drawn will turn purple on most papers if there is an indication of pH neutrality
- Please note: This is a pH indicator only. Unreliable results may occur on colored, coated, or unbuffered materials

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000KNJCSS |
| Best Sellers Rank | #32,620 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #257 in Drawing Pens |
| Brand | Lineco |
| Brand Name | Lineco |
| Customer Reviews | 4.4 out of 5 stars 206 Reviews |
| Included Components | Lineco pH Testing Pen for Paper or Paperboard Products. |
| Item Weight | 0.01 Kilograms |
| Manufacturer | Lineco |
| Material Type | Paper |
| Model Number | L533-0023 |
| Number of Items | 1 |
| Part Number | L533-0023 |
| Ph Range | 6.8 and above |
| Sterility Rating | 6.8 and above |
| UPC | 099295003506 099295530811 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 Year Limited Warranty |

## Product Details

- **Brand:** Lineco
- **Manufacturer:** Lineco
- **Ph Range:** 6.8 and above
- **UPC:** 099295003506 099295530811
- **Unit Count:** 1.0 Count

## Images

![Lineco pH Testing Pen for Paper or Paperboard Products. | Easy to Test Paper for Acid, Turn Purple On Neutrality Papers - Image 1](https://m.media-amazon.com/images/I/61FB-6FHRgL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does the pen tip turn color after the first several uses? Mine went from yellow to purple.**
A: Mine's half of the tip turned from orange into purple the first time I used it. Some say it will fade back over time while others say it's permanent. I don't know about validity of readings but I suppose they should still be consistent.

**Q: can this be used on fabrics?**
A: Sorry, it cannot. It only can be sued on paper or paperboard products. Thank you.

**Q: Would this work to test stickers?**
A: I haven't tried it specifically on stickers, but it has worked on all the various surfaces I have tested so far.

**Q: Will this work on black paper**
A: I'm not sure that it would, but I haven't specifically tried it on black paper.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This really works on watercolor paper (I tested on acid paper, too)
*by P***E on March 18, 2025*

I occasionally run across a new brand of watercolor or mixed media where the listing says it's acid-free, but the pad doesn't say anything about it. I wondered if there was a way to test the paper that didn't involve grinding it up and putting it in Ph neutral water, and in my searches, someone on a forum recommended this, the Lineco pH Testing Pen for Paper or Paperboard Products.. I ordered one immediately. When I opened it up, there was a label firmly stuck over the part that tells what color to look for, so I came back to the listing and noticed a reviewer said this was just a purple marker. So I did a test. I used the marker on 3 pads of watercolor paper. All three showed a purple mark, which is the sign the paper is Ph neutral. Then I took one of those sheets of paper and gently applied lemon juice across the surface. When it dried, I tried the maker on it - and got a clear line, which means the paper is "unsuitable" or acidic. So yes, this pen does work. It works if you want to test your paper for Ph to make sure it won't yellow, become brittle or cause ink, watercolors or pencil to fade over time. Good news for me is that the very nice paper I got recently that didn't say it was acid-free on the pad got a purple mark from the test pen. One of the older pads that claimed in the listing to be acid-free but not on the pad ended up with a clear mark. Super product.

### ⭐⭐⭐⭐⭐ Works the same regardless of the pen’s tip color
*by A***R on July 25, 2025*

I really love this pen. I have all kinds of journals, sketchbooks, loose papers, and cardstock that I enjoy using for journaling and this pen is a fantastic tool to check anything that isn’t labeled as acid-free or that one isn’t completely sure about. A simple swipe of the pen on the paper will reveal whether it’s acidic or not - the line left on the page will instantly appear purple for an alkaline pH or, alternatively, instantly turn clear/transparent or yellow for an acidic pH. When it arrived, I spent a fun evening going through stacks of journals and paper and checking everything. My pen arrived with a solid purple tip (some seem to have light tips out of the package) but the marks it left behind on the pages changed color appropriately depending on the pH of the paper. I tested the pen on known (labelled as such) acid-free sketchbooks, journals, papers, and cardstock from The Paper Studio (Hobby Lobby), Peter Pauper Press, Recollections from Michael’s, and a few other random things and then to test for acidity I also tested the pen on some Moonster journals and old, yellowed (some nearly tan) notepads and notebooks that are definitely acidic and aging. The pen’s mark changed color appropriately - purple for everything labelled as acid-free: sketchbooks, The Paper Studio, Peter Pauper Press, and Recollections and then yellow or clear/transparent for old and yellowing notepads, notebooks, and Moonster - even though the tip of the pen itself was solid purple. I saw that some people were concerned about the color of the pen’s tip upon opening the pen for the first time, so whether the tip on your pen is purple or light when it arrives it’ll work the same regardless. An essential tool to keep on hand for anyone with an eye towards acid-free and archival-quality materials!

### ⭐⭐⭐⭐⭐ works as it should.
*by C***Y on March 11, 2026*

Works

## Frequently Bought Together

- Lineco pH Testing Pen for Paper or Paperboard Products.
- LINECO Neutral pH Adhesive 8 Oz, Acid-Free, All-purpose Glue, Dries Clear and Remains Flexible. Used for Bookbinding and Book Repair, Framing, Collages, Paper Art and Crafts

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-11*