The Best Pens for Leuchtturm1917: What an Office Buyer Learned After $1,200 in Bleed-Throughs

When I took over purchasing in 2020, standardizing our office notebooks was the first big project I owned. We're a 400-person company across three locations, and I manage roughly $150,000 in annual office supply spend across 12 vendors. Notebooks seemed like the easiest category to consolidate—until they weren't.

I picked Leuchtturm1917. The page numbers alone were a game-changer for our operations team. No more flipping through notebooks hunting for that one meeting note from three weeks ago. Table of contents. The dot grid people kept asking for. I ordered 300 units split between A5 and A6. Total with shipping: $2,800.

Six months in, the complaints started.

"They bleed through."
"I can't write on both sides."
"This notebook eats my pens."

The first time a department head showed me a Leuchtturm1917 page with ink bleeding through the back, I took it personally. This is a premium German notebook, made since 1917. It costs four times what a cheap spiral pad costs. How is this on us?

But when the same complaint shows up from three departments in one quarter, you stop being defensive and start being curious. Red flag: the complaints were never about the notebook itself—the cover, the binding, the layout. They were always about ink. That was the clue I missed at first.

The Problem Is the Pairing, Not the Paper

Here's what I didn't understand until I spent an afternoon testing pens with our ops manager:

Leuchtturm1917 uses 80gsm paper. That is not heavy paper. Moleskine sits around 70gsm. Rhodia ranges from 80 to 90gsm depending on the line. Tomoe River paper is famously thin at 52gsm but coated to handle fountain pens beautifully. The whole idea that "heavy paper equals no bleed" is incomplete.

What actually determines bleed-through is the combination of three things: the paper's surface treatment, the ink's flow properties, and the nib size. A heavier uncoated paper can bleed worse than a lighter coated one, depending on what you write with. It's the interaction that matters. (In other words, this is a compatibility problem, not a quality problem.)

Here's the blind spot I had: I focused entirely on the notebook and completely missed the pen side. The default office pen—the cheap 0.7mm or 1.0mm gel pen from the supply closet—is one of the worst offenders. Gel pens lay down a lot of wet ink. On 80gsm uncoated paper, that means bleed. And the folks in the office who splurged on nice fountain pens were the loudest complainers of all.

The counter-intuitive part? The more expensive the pen, the bigger the risk. A $160 fountain pen with a medium or broad nib puts down way more ink than a $2 ballpoint. It writes beautifully on the right paper. But on 80gsm, it soaks right through. Your team members aren't using bad pens. They're using good pens with the wrong pairing.

If you've ever watched a smart person give up on a premium notebook after three pages—dropping it into recycling with that look of "I guess it's just overpriced"—you know exactly how this plays out.

What This Costs an Office

In 2024, I ran the numbers on actual notebook usage versus what we bought. Out of the 300 units I ordered in 2022, I estimate about 40% were abandoned or quietly returned to the supply closet after one or two bad experiences. That's roughly $1,100 in dead inventory. Actually, I checked the system—closer to $1,250. I'm mixing it up with the A6 order from that quarter.

The financial hit stung. But the bigger cost isn't captured in purchase reports: it's trust.

When employees have a bad experience with something you bought, they remember. They tell their team. Before long, people start bringing notebooks from home and your standardization project quietly falls apart. Nobody writes a memo about that. It just erodes. And the next time you propose a "premium" supplier, you get pushback—because everyone remembers the notebooks that bled.

In March 2024, I had a moment that changed how I think about this. Our creative director was prepping for a pitch. She showed me a page in her Leuchtturm1917 where ink had ghosted so badly she couldn't use the back. She wasn't angry—more disappointed. "I wanted to love this," she said.

That one sentence did more than any spreadsheet I could have put in front of my VP.

Honestly, I'm still not sure why some pen-paper combinations fail so dramatically. My best guess is that it comes down to ink viscosity and how fast the page absorbs. But I don't need to understand the chemistry to know what works.

The Fix: Better Pens, Not Better Notebooks

We ran an internal pen test. It took two hours and saved us well over $1,000. Here's exactly what we did:

• Ordered 15 pens across four categories: ballpoint, gel, rollerball, fountain.
• Our ops manager built a test sheet: one page in a Leuchtturm1917, two lines from each pen, then we checked both sides after the ink dried.
• Put the test sheet in the break room. Let anyone try the pens and mark what they'd actually use daily.

The results were clear enough to act on the same week.

Tip size matters more than pen brand. Fine nibs (0.5mm or thinner) were consistently safer. The 0.7mm and 1.0mm pens in our supply closet were the worst offenders (ugh, the amount of ink those things dump on a page). Switching to 0.5mm eliminated most of our complaints.

Oil-based ballpoints are underrated. The humble Bic Cristal performed surprisingly well because oil-based ink has low flow—it doesn't soak in before drying. Even the 1.0mm tips were fine.

Gel pens work, with a caveat. The Pilot G2 in 0.38mm was clean. The same pen in 0.7mm bled. Same family, different result. Tip size was the deciding factor.

Fountain pens are the wild card. If your office has fountain pen enthusiasts, they need extra-fine or fine nibs paired with drier inks (e.g., Pelikan 4001 or Lamy standard ink). Medium and broad nibs on 80gsm are a deal-breaker.

We updated the supply catalog with a short approved list: Bic Cristal, Pilot G2 0.38mm, Uni-ball Signo 0.5mm, and Lamy Safari with an extra-fine nib. Nothing exotic. All available from our standard vendors. Updating the catalog was a no-brainer once we saw the test results.

Pen-related complaints dropped about 80% between 2023 and 2024. We had 11 in 2023; I want to say we had 2 in 2024, but don't quote me on the exact number. The important part: nobody's asking me to replace the notebooks anymore.

One more tip: the Leuchtturm1917 dot grid doubles as a measuring tool. Dots are spaced 5mm apart, so if you need to measure an inch without a ruler and a notebook is nearby (which, in our office, it always is), count five dots—that's 25mm, just over an inch. Not bad for marking margins in a hurry.

The Bottom Line

This approach worked for us, but I'll add a caveat: we're a 400-person company with mostly gel and ballpoint users. If you're a design studio where everyone lives in fountain pen territory, the calculus could be different. You might want a notebook with heavier paper, or you'll need to be even more selective about inks. Your mileage may vary.

Take it from someone who learned the hard way: when you buy premium notebooks for an office, you're not just buying paper. You're buying a system. The pens people pair with the notebook are half of that system. Get the pairing wrong, and you waste budget, frustrate your team, and end up with a shelf of half-used notebooks nobody wants to touch.

Get it right, and the Leuchtturm1917 earns its place. The page numbers, the structure, the build quality—it genuinely helps people stay organized. But only if the pen in their hand lets the notebook do its job.