Making Dry-Erase Erasers

Posted December 9, 2016

by Lensyl Urbano

Two of my first dry-erase erasers.

Two of my first dry-erase erasers.

I painted the wall on my new space in the basement to make it a dry-erase surface. Unfortunately, I did not have an eraser to use on it, so, I decided to make my own down at the TechShop. And what started as a simple project turned into a bit of a rabbit hole.

The Shopbot CNC router is great for cutting shapes out of wood. I started with simple rectangular 2 inch by 4 inch blanks with designs and patterns, but that truly does not take advantage of the technological possibilities. Map projections can have some interesting shapes, so I tried a few that I could find black and white vector-graphic maps for on the Wikimedia commons (Mollweide and Sinusoidal projections).

The Shopbot CNC mill cutting out a blank for a Mollweide map projection.

The Shopbot CNC mill cutting out a blank for a Mollweide map projection.

After a little sanding (of the edges and sides in particular) I put the wooden blanks on the laser. It helped to cut out a template for the wooden blanks to sit in so I could do multiple blocks at the same time.

Lasering on the maps.

Lasering on the maps.

I put on a few coats of polyurethane to protect the wood surface (I also tried a spray on sealer I had sitting around–we’ll see which one works better) and then attached velcro strips to the bottom.

Adding velcro to the erasers.

Adding velcro to the erasers.

One of my old sweatshirts served as material for the erasing.

A few of the first erasers with a rectangular form.

A few of the first erasers with a rectangular form.

Erasers with different map projections.

Erasers with different map projections.

Citing this post: Urbano, L., 2016. Making Dry-Erase Erasers, Retrieved January 19th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

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