Hardness of rubber

Most rubber materials fall under the Shore A durometer (hardness) scale. Rubber harder than 100A is measured on the Shore D scale.

Examples range from soft to hard…

• Rubber Band: Shore hardness 20A 
• Pencil Eraser: Shore hardness 40A 
• Car Tire Tread: Shore hardness 60A 
• O Ring: Shore hardness 70A 
• Marine Fenders: Shore hardness 75A 
• Shopping Cart Wheel: Shore hardness 100A 
• Bowling Ball: Shore hardness 72D

(Source: GB Rubber Supply Ltd. - Products & Materials)

Style Guide | The Economist

Style Guide | The Economist

AsapSCIENCE - YouTube

AsapSCIENCE - YouTube

AsapSCIENCE - Your Weekly Dose of SCIENCE

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2800 icons—in return for a link

2800 Icons from Ivan Boyko (VisualPharm) offers a collection of icons in iOS 7 and Windows 8 styles in PNG format at multiple bitmapped sizes (from 25x25px to 512x512 px) with searching by tags – free but  in return for a link back to the developer's site. Vector-based versions available at extra cost

(Source: Macintouch | Cost: Free (link to developer requested) | Requires: Mac OS X 10.8+ | For further info... )

The Best Winter Boots | The Wirecutter

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The Best Winter Boots | The Wirecutter

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(Source: Macintouch) | Cost: US$19.99. | Requires: Mac OS X 10.6+  & iOS | For further info... 

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