How is eraser made

There are barrel or click erasers which are built like mechanical pens that have an eraser as a core instead of lead. Novelty erasers, which are modeled as other objects or figurines are often made from hard vinyl which does not erase too well. Today we have erasers of different types, not just shapes. The only problem is as with old erasers that they crumble why doing so and their residue has to be removed.

This is often done with a broad brush. It does not leave behind eraser residue like art gum eraser, and because of the lasts longer, but it loses its efficacy and resilience because particles that it erases stay inside it. Kneaded eraser can be shaped into a fine point to erase small details; it can be shaped into a larger surface and work as a stamp, and it can work as a blotter to lighten a darker area covered with graphite. They cannot erase larger areas because they deform while rubbing.

Because of the way it works it does not smudge or damage work in progress. Hello, Wendy! We appreciate your comment! We think your ideas are great, and really like how you noted that Wonderopolis helps make learning relevant in your students' lives! Thanks for commenting today, Marie! We are so happy to hear that you have been exploring Wonderopolis!

Thank you so much for sharing! Hi, Angie! So glad to have a librarian commenting today! Thank you for sharing your interactive bulletin board idea with everyone We're glad you stopped by today, Sandyh50! We love to hear about students journaling with Wonder Thanks so much for sharing your end-of-day strategies for utilizing Wonderopolis in your classroom!

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How does an eraser work? What is graphite? Who invented the eraser? Tags: See All Tags carbon , eraser , friction , graphite , lead , paper , pencil. Not quite… now where did I put that eraser? Wonder What's Next? Try It Out Erasers help us correct our mistakes, but did you realize they can also be used to make all sorts of interesting crafts? Take a look at the following art projects, and choose one or more to try: When you're finished, email or send us a letter with a picture of your eraser art project!

Did you get it? Test your knowledge. Wonder Words graphite logical scientific lead mineral carbon softener abrasive Take the Wonder Word Challenge.

Join the Discussion. Calvin Nov 14, Nov 15, Thanks so much! We'll get that corrected. I didn't think that an eraser had that much to it. Mar 5, Sep 10, This is so unbelievably cool! I can't believe that the graphite sticks to fiber in the paper and the ingredients in the eraser loosen the graphite to the point where it's able to grab hold of the graphite and keep it their. Nov 4, Tung tung May 28, This is the most amazing and special piece of information about eraser I've ever seen.

Thanks for the help! Good info for my home work. May 31, Koenig Dec 4, This is a great little article. I'd love to see an electron microscope series of an eraser "picking up" graphite particles. Wonderopolis Dec 4, Aparajita Guha Jun 30, I wish there was one eraser which would erase our parents' mind so that they won't remember our mischievous deeds.

Wonderopolis Jun 30, Troy Oct 16, I think it is really weird that people used to erase with white bread instead of rubber. Don't you think that is weird? Wonderopolis Oct 17, Elango Sep 29, I started reading the wonderopolis recently and it amazes me everyday: Now i am started looking at the past ones which i missed out. Thanks for sharing the wonderful information daily.

Wonderopolis Sep 30, Wonderopolis Sep 12, Hey cool, glad my little stop-motion countdown could help illustrate your post. Wonderopolis Aug 16, Sister Jane Aug 10, I just completed a Thinkfinity seminar on Monday so I have just recently been introduced to the marvels of Wonderopolis!

I will inservice the other teachers about this great website and we will introduce Thinkfinity with Wonderopolis to all of the parents on Back to School Nite! Wonderopolis Aug 10, Here's the science: Modern erasers are almost always made from petroleum-based synthetic rubber compounds, typically polyvinyl chloride they're no longer made from natural latex rubber, which is an allergen for some people.

Because the particles in the polymer that make up an eraser are stickier than paper, those graphite particles get stuck to the eraser instead.

Some erasers are stickier than others and absorb graphite particles more easily, giving you a cleaner, less-abrasive result. Believe it or not, one of the very first erasers used was moist bread. Let's talk about how far erasers have come since the days of day-old bread, next. You can expect to write about 45, words with a single pencil, and along the way there are sure to be a few mistakes. And with mistakes come erasers -- and some erase better than others. Pencil erasers also called plug erasers , for example, and those standard-issue pink school erasers are basically the same type of eraser -- while they get the job done, they're considered some of the worst offenders when it comes to smudging, leaving behind eraser debris, and tearing or wearing a hole in the paper.

As you rub the eraser against the paper, the eraser begins to disintegrate -- some of this will help remove the graphite and some you'll need to brush or blow away, but this hard rubber may require you to rub vigorously to get your desired result. Softer rubber erasers require less force and friction, making them less abrasive to paper.

White vinyl erasers, for example, erase more cleanly than the common pink eraser because they are made of softer vinyl. Kneaded erasers are moldable and soften when you knead them in your hands. They're one of the least abrasive erasing tools for removing graphite, charcoal and lead , and because this type of eraser is sticky enough to absorb graphite particles without friction, they leave no smudges, debris or tears.

Erasers can do more than erase your unwanted pencil doodles, though. Remember erasable-ink pens? Erasable inks may not be as popular today as they were in the s, but if you're looking for an erasable ink product, they're still out there.