Posts filed under NanoDia

Uni NanoDia Low-Wear Pencil Lead 0.5 mm HB Review

I think we are on to something here.

Towards the beginning of this project, I reviewed the 0.7 mm H-grade version of the Uni NanoDia lead. It was good, and I saw why it was popular. It just wasn’t for me specifically. Little did I know that a lead one size and one hardness away from that one might be the one I have been looking for all along.

The Uni NanoDia 0.5 mm HB lead is my favorite lead I have tested so far. Many of you are yelling at me right now saying “We told you so!” But, I’m stubborn. I had to find out for myself. I actively avoided choosing to review it too, knowing that it is one of the more popular leads on the market. It only came up this time because I chose to make a blind choice for this review, reaching into my pouch of 15-plus packs left to review and sticking with whatever came out.

I’m glad this one did. Being 0.5 mm and HB makes this one of the most standard leads on the market. The middle ground, stock lead, if you will - but with added diamond particles for durability! From the moment I loaded it into my Pentel P205 I knew it was going to be good. The darkness was right, and most importantly, the feel was right.

I’ve said in nearly every mechanical pencil lead review I have done that I want the graphite to feel like graphite, not plastic. There has to be feedback and texture. I understand that additives are required due to the fragility of the individual sticks of lead, but they can’t feel fake. This one delivers on that feeling of authenticity.

This is the first lead I have wanted to keep loaded in the pencil after I was done with the review. That surprises me because I thought for sure I would land on the harder end of the graphite scale. And maybe I will as I continue to go through these tests. But until then, the Uni NanoDia 0.5 mm HB is the best lead I have come across.

(JetPens provided this product at no charge to The Pen Addict for review purposes.)

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Posted on May 14, 2019 by Brad Dowdy and filed under Uni, NanoDia, Mechanical Pencil Lead, Pencil Reviews.

Uni NanoDia Low-Wear Pencil Lead H 0.7 mm Review

And you thought pen names were long?

Mechanical pencil leads get after it too, like this Uni NanoDia Low-Wear Pencil Lead. I’m surprised they didn’t spell out Dia-mond in the name, because that is the selling point: Nano-diamond pieces that strengthen the lead. Hashtag Marketing!

Before we get to that, I wanted to spend a minute on a graphite I eliminated from testing without a full review. I found the Rotring Tikky Hi-Polymer HB 0.5 mm lead not good. One of the “features” of most mechanical pencil lead is that they are mixed with plastic (polymer) because pure graphite would be too brittle to function in the tiny diameters needed for mechanical pencils. As it turns out, hi-polymer leads may not be for me.

I want my mechanical pencil leads to have a bit of feedback. They don’t have to feel like a traditional wooden pencil, but I don’t want them to feel alien either. The Tikky Hi-Polymer felt fake to me, and I didn’t enjoy it from the moment I loaded it up. On top of that, it is one of the most expensive per piece leads on the market. Those things in combination make it a hard pass for me.

The Uni NanoDia H 0.7 mm, on the other hand, is good. It’s not great, which we will get to in a minute, but it is good.

For testing, I loaded it up in the Uni Shift Pipe Lock 0.7 mm Drafting Pencil, and got to writing. First off, there was some feedback in the line. Not a lot mind you, but after the plastic feeling of the Tikky, this one felt more normal. It was durable too, without feeling like a rock. Maybe nano diamonds are for real! The tip held its point consistently, and for long writing sessions. I didn’t extend the lead once on the handwritten page for this review, and no one side of the lead became overly sharp or angled in the process. My normal hand rotation when writing kept it even.

But I didn’t love it. Part of this test is to figure out what I am looking for in a mechanical pencil lead, and smoothness at the cost of natural feel is not it. Also, 0.7 mm is a tough size for me. Like with fountain pen nibs, I enjoy the opposite ends of the tip size spectrum - EF and 1.1 mm stub for example - not the center. 0.7 mm is the medium nib of the mechanical pencil world.

I think the Uni NanoDia lead is perfect for students who are writing page after page with their mechanical pencils. It will thrive in that environment, and I think that is the reason why it is so popular. I need something more from my leads, and this project is helping me sort out what exactly it is that I am looking for.

I have a huge batch of testing to complete, but if you have found your perfect mechanical pencil lead please let me know in the comments so I can check it out.

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