The Great Eraser Rub-Off Challenge, Round 2

Review by Tina Koyama

A while back Ana conducted a massive Eraser Rub-Off, in which nine erasers battled for dominance in the obliteration of graphite and colored pencil markings. I decided it was time for Round 2, with a little twist. (Sorry, no video from me!)

In addition to the usual eraser needs when I’m writing with graphite pencils, I also have a specialized need: erasing colored pencils. While I don’t often erase large areas of color (if that’s needed, I start over), I sometimes want to brighten a highlight that I’ve inadvertently lost or, more likely, forgotten to save the white of the paper for. That specialized task usually calls for an eraser that can cleanly rub out a tiny area.

My long-time favorite for this task has been the Tombow Mono Zero with a rectangular eraser ($5.25),whose precise corners are ideal for putting in small highlights in colored pencil sketches where I need them. It’s also an all-around great eraser for basic graphite writing, too. So in Round 2, I considered the Mono Zero to be the defending champ. Would any of the new challengers threaten or take its title?

The challengers are:

  1. Kokuyo Miri 5 Function ($3)
  2. Kokuyo Kadokeshi 28-Corner ($3.50)
  3. Moleskine (which comes in a set with a sharpener) ($5.95)
  4. Pentel Ain Clic Knock ($2.50)
  5. Uni E-Knock ($1.65)
  6. Tombow Sand ($2.65)
  7. Seed Sun Dolphin 3 (electric) ($22.50)
  8. Palomino Blackwing (10/$2.95 for refills; I used the one attached to my pencil)

The writing utensils I used for the challenge were a Palomino Blackwing Volumes 16.2 pencil (which has a “firm” core), a Mitsubishi Penmanship 6B graphite drawing pencil, an indigo blue vintage Col-erase colored pencil, a scarlet Faber-Castell Polychromos colored pencil, and a bright green Caran d’Ache Museum Aquarelle water-soluble pencil. The colored pencils I chose cover the range of erasability, from most easily erased (Col-erase) to most troublesome (heavily pigmented Caran d’Ache). Since the Tombow Sand eraser is intended for ink and typewriting, on a whim, I decided to toss a Jetstream ballpoint pen into the mix.

The papers I tested on were a Plumchester sketchbook, which has a smooth surface similar to many journals and notebooks, and a Canson XL mixed-media sketchbook, which has a relatively toothy surface.

Before I show you the results, I have to confess that I went into the challenge with some prejudices. I had high hopes for the two Kokuyo erasers with such funky shapes! Surely all those corners and edges would be excellent for making small targeted erasures. And they both get bonus points for cool design, right?

I also had high expectations for the Seed Sun Dolphin electric eraser. I had been wanting to try an electric eraser for a while, but frankly, I was a bit intimidated by some of the fancy models I’d seen in the architectural section of art supply stores. This battery-operated model looked closer to my pace.

OK, now on to the results.

On the Plumchester’s smooth surface, most contenders performed satisfactorily in easily rubbing out graphite writing. The heavy shading from the Uni Penmanship took more effort, but most took the graphite off cleanly. The one exception in both cases was the Moleskine, which was the challenge’s only black eraser. It had a harder time cleaning up the Penmanship’s shading and even the Blackwing’s writing without smudging, or maybe it was just leaving behind some of its own black material. Most of the white erasers created medium-to-long strings that were easy to blow or brush away. The Tombow Sand eraser made small dust particles instead of strings.

As expected, the colored pencils presented a tougher challenge for all contenders. Still, the Kokuyo 5 Function, the Uni E-Knock, and the Pentel Ain Clic Knock did very respectable jobs on the Col-erase and Polychromos – at least as well as the Tombow Mono Zero defending champ. The Moleskine did OK too, at least in taking off pigment, but it also left a dark smudge as it erased. The electric Seed did the best cleanup job on all colored pencils, beating even the champ.

Not surprisingly, the toothy mixed-media sketchbook gave all contenders a heavier workout. Although erasing took more effort, most erasers did satisfactorily on graphite (the Blackwing did a bit worse than others). The Tombow Sand smeared. The Uni E-Knock did a particularly clean job on both graphite and colored pencils. Caran d’Ache’s high pigment content was especially challenging for all but the electric Seed.

Of note: None of the erasers could touch ballpoint pen on either paper – not even the Tombow Sand eraser that is intended for ink. (If you want indelibility, ink still wins.)

You can see for yourself how the contenders performed, but I’ll mention a few other points. While the Sand eraser did a good job of rubbing out colored pencils, I could feel that the paper had been abraded by the eraser’s particles. If you don’t plan to draw or write again on the erased surface, it’s probably OK, but if you rework it, I’d be wary of damage to the paper’s surface.

The two Kokuyo erasers, which I had high hopes for, competed admirably in terms of rubbing out marks, but both were disappointing in operation. Although they have all those small corners and edges that should be able to target tiny areas, I had difficulty seeing where the corners and edges were aiming, so my erasure often ended up wider than I wanted.

The electric Seed Sun Dolphin takes a bit of practice to control and use effectively. The switch feels misplaced on the boxy base, at least for my hand, making it a bit tricky to hold at the right angle for erasing. If you leave it too long on one spot, it can sort of run away with you.

The Winners

The electric Seed Sun Dolphin erased the most completely as well as with the finest point – two of my most important erasing requirements – so I was very pleased by its performance. As a final test, I made the small tomato sketch and deliberately didn’t save out the white of the paper for the upper-left highlight. I used heavily pigmented Caran d’Ache Pablo colored pencils in a Stillman & Birn Alpha sketchbook. After three layers of pigment, I used the electric Seed to erase out the highlight, and since I had practiced aiming and controlling the thing, I was able to point it where I wanted it. The highlight is not as bright as it would be if I had saved the paper, but it’s perfectly adequate for my purposes, and the paper’s surface doesn’t feel damaged. With that, I declared the Seed Sun Dolphin the winner of the Rub-Off!

I realize, however, that it wasn’t quite fair to throw that electric into the mix, and for most people who just want to erase a word or letter, it’s probably overkill. So I also chose a manual champ: The Uni E-Knock. It erased as effectively as, and sometimes better than, my former favorite Tombow Mono Zero. It also has a slightly chunkier barrel than the Zero, which I find easier to hold and use. The plastic body isn’t quite as classy looking as the Zero’s modern styling, but it gets points for being see-through. I just wish it had a rectangular eraser like the Zero. Honorable mention goes to the Pentel Ain Clic Knock, which also did a fine job, and its triangular-shaped eraser has good corners that are easy to aim. However, its body loses points for being as sharply triangular as its eraser and for its strangely robotic-looking knock mechanism.

tina-koyamaTina Koyama is an urban sketcher in Seattle. Her blog is Fueled by Clouds & Coffee, and you can follow her on Instagram as Miatagrrl.

DISCLAIMER: The items included in this review were provided free of charge by JetPens for the purpose of review. Please see the About page for more details.

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9 comments / Add your comment below

  1. It’s possible I’m on crack, but I’m not seeing the Uni in the erasing tests.

    Pentel’s Twist-Erase line has been a favorite of mine for decades now if I’m forced to use a pencil, and part of the reason why is the huge and very good eraser. Some of Pentel’s newer eraser lines are better, but the convenience of having an attached eraser is very nice. And they sell refills, and the refills won’t get lost after you buy them because they’re so tiny.

    Zebra’s Sumo mechanical pencils are similarly good, but with a very fat soft grip and a smallish eraser. Good, but small. I’m not sure what the comparable eraser block would be.

    It’s good to see that at least some Japanese brands are trying to beat Pentel. And mechanical pencils are very nice if you are prone to breaking wood pencils or if you wear out a wood pencil’s eraser long before you finish it. Or if you have a terror of needing to sharpen a pencil during a test.

    1. You probably missed the Uni in my tests because I was inconsistent and labeled it “Mitsubishi E-Knock.” The eraser itself has Mitsubishi branding, but JetPens calls it Uni. I’m not a huge fan of mechanical pencils, but when I need one, the Sumo is my favorite. JetPens carries several Sumo erasers in block form, too.

      1. That’d do it! Basically I never really enjoyed wooden pencils as a kid. They’d snap so easily. Ugh. And I’d run out of erasers and lose separate ones. Add in the graphite smears and it’s no wonder I found them frustrating.

        Mechanical pencils were slightly less upsetting. But most had regular to teensy erasers. And a pencil you can’t erase is rather pointless.

        Add in I have a learning disability and I figured out that erasing actively hurt my ability to learn in a bunch of classes and I wound up with a bunch of pens, and 1 lone mechanical pencil for when it was required.

  2. Instead of the seed dolphin electric eraser – the daiso alternative is not only cheaper but my husband loves it for the thicker type sketch books he uses (paperwise) doesn’t rid it of its toothiness.
    Have you tried the daiso option? It comes with refills for pencils and the grainy kind for pens.

  3. The Pentel Ain Clic Knock was my favorite eraser in college. For me, the big draw was that it always stayed “cleaned” and didn’t clutter up my pencil case.

    I never thought to use it for colored pencils before. Thanks for the post.

  4. Seed Sun Dolphin 3: How can a dirt simple little battery powered plastic eraser with a tiny motor in it end up selling for a whopping $22.50? I guess when it comes to JetPens, the sky really is no limit.

    Go to Amazon and search for: Derwent Battery Operated Eraser. It’s a well known product that’s functionally the same as the outrageously over-priced Seed Sun Dolphin 3 eraser. After digging a bit, the best price I found for the Derwent eraser was $4.72, and it comes with 8 refills. A bag of 30 additional refills is $2.59 (8.6 cents each). Buy the eraser and a bag of refills together for $7.31. Both are eligible for free shipping on orders over $25 – but I don’t know about Prime.

    There are lots of other battery operated erasers on Amazon to choose from, and you’d be hard-pressed to spend over ten bucks on any of them.

    Enjoy, David

  5. Ohuhu kit works great on colored pencils doesn’t damage your paper. I like that it comes with an ample supply of refills. I haven’t had to change the one it came with yet. And it hasn’t lagged or broken on me. For the price, it’s a good product.

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