Tag Archives: Education

Making Pink Pencil Erasers

See how the ubiquitous pencil erasers are made.

How Erasers Are Made

March 08, 2018

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Extra Shoe Lace Hole To Keep Shoe Laces Tied

Never trip from shoe laces that come undone again.

How To Use The Extra Shoelace Hole On Sneak

November 01, 2016

Expert Coconut Husker

Master!

How to Husk a Coconut

May 05, 2016

Water Droplet In Hot Oil

Fascinating.

“The initial water droplet expands as it shifts from liquid to vapor (top). At a critical volume, the expansion occurs explosively (middle), causing the bubble to over-expand relative to the pressure of the surrounding fluid. The higher pressure of the oil around it collapses the drop, which then re-expands, creating the cycle http://io9.com/heres-what-happens-when-you-throw-water-into-hot-oil-1729739429

“Drop of water in hot oil.”
Image courtesy of https://imgur.com/gallery/idnKfht.

Double Edged Razor Blade Sharpening

Interesting methods of double razor blade sharpening from long before disposables became fashionable.

“Vintage Razor Blade Sharpener.”
Image courtesy of https://imgur.com/gallery/Mn9mLtc

Operation of razor blade sharpeners

August 2, 2013

Double edge razor sharpener

April 18, 2008

Published on Apr 18, 2008

There are two leather wheels on the inside. Before use, I add a little olive oil, then begin turning. It’s a mini strop for double edge razors. I’ve used the same razor for weeks.

Little double edge razor blade sharpener in Bakeltie box [Bakelite]

February 18, 2010

Forging A Spring

Curl Away!

“The birth of a spring.”
Image courtesy of https://imgur.com/gallery/AXNQbcW.

Making Globes The Old Fashioned Way In 1955

Cool.

Globe Making: How the World is Made (1955) | British Pathé

April 13, 2014