--- product_id: 806453749 title: "Lineco pH Testing Pen for Paper or Paperboard Products. by Lineco" brand: "lineco" price: "€ 21.63" currency: EUR in_stock: true reviews_count: 5 category: "Lineco" url: https://www.desertcart.it/products/806453749-lineco-ph-testing-pen-for-paper-or-paperboard-products-by store_origin: IT region: Italy --- # Precise acidity measurement Color change at pH 6.8+ Instant pH detection Lineco pH Testing Pen for Paper or Paperboard Products. by Lineco **Brand:** lineco **Price:** € 21.63 **Availability:** ✅ In Stock ## Summary > 🖊️ Protect your paper legacy with a single stroke! ## Quick Answers - **What is this?** Lineco pH Testing Pen for Paper or Paperboard Products. by Lineco by lineco - **How much does it cost?** € 21.63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/806453749-lineco-ph-testing-pen-for-paper-or-paperboard-products-by) ## 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 - • **Compact & Portable:** Sleek pen design fits in your toolkit or pocket for on-the-go testing. - • **Instant pH Readings:** Draw a quick line and get immediate acidity results—no waiting, no fuss. - • **Simple One-Step Use:** Just draw a line—no complicated setup or calibration needed. - • **Visual Color Indicator:** Pen tip turns purple at pH 6.8 or above for easy, unmistakable readings. - • **Accurate Acidity Detection:** Detects if paper or board is acidic, protecting your valuable documents and projects. ## Overview The Lineco pH Testing Pen offers a fast, reliable way to determine the acidity of paper and paperboard products. With a simple line-drawing method, it instantly changes color to purple when the pH is 6.8 or higher, helping professionals and hobbyists safeguard their archival materials and creative projects from acid damage. ## Description pH Testing Pen;Determine if paper or board is acidic;Simply draw a small line to use;Pen will turn purple if pH is 6.8 and above Review: 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: Tester l'acidité des feuilles de scrapbooking ## Features - Lineco pH Testing Pen for Paper or Paperboard Products. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000KNJCSS | | Amazon Bestseller | #563,173 in Electronics ( See Top 100 in Electronics ) #392 in Two-Way Radio Batteries | | Brand Name | Lineco | | Customer Reviews | 4.4 4.4 out of 5 stars (190) | | Item Weight | 0.01 Kilograms | | UPC | 099295003506 099295530811 | ## 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. by Lineco - Image 1](https://m.media-amazon.com/images/I/61FB-6FHRgL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Review *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. ### ⭐⭐⭐⭐⭐ Review *by L***9 on June 21, 2019* Tester l'acidité des feuilles de scrapbooking ### ⭐⭐⭐ Review *by V***N on July 15, 2023* 12 quid for a pen - pfff. but it does the job ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/806453749-lineco-ph-testing-pen-for-paper-or-paperboard-products-by](https://www.desertcart.it/products/806453749-lineco-ph-testing-pen-for-paper-or-paperboard-products-by) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-14*