January 24, 2016
I bought nearly every block eraser that Japan makes in a recent shopping binge.
As a math major, I need lots of erasers as it is, but I also wanted to determine
which ones worked best for my needs. I tested all of the erasers on three
different types of pencils: a Pilot Eno color .7, a Pentel graphite .5 and a
Pentel color 2mm, and then on three different paper types: Rhodia, an index
card, and then plain old American junk copier paper.
The type of paper wound up not mattering with the performance of any of the
erasers. What mattered was what they were erasing.
So with that established:
I wanted to love the Uni Boxy. I really did. I liked the sleek black color and
adored the way it felt in my hand. The shape makes it easy to maneuver with this
eraser, and my hand never gets tired using it. It worked very well on .5 and .7
leads, color and graphite.
Where it fell flat was with the 2 mm Pentel color leads. It was worse than most
erasers at cleaning that up, and that's a deal breaker for me, because I use the
Pentel every single day for my math work.
I also don't like that this eraser does not play well with other items. I put it
in a small case with some American pencil case-type office supplies that I
cadged from work just for this test, and let it ride in my backpack while I went
to work, then a study group session. Unfortunately, it's true that the Boxy
stains plastic items that come into contact with it. That's a nail in the coffin
for this eraser. I'm not about to put it in a case with items I do care about,
which is what I carry with me every day.
It will sit on my desk at home now, which is fine, but that doesn't do me much
good, when I do so much of my work away from home.