Interesting: Hard Rubber

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DurocShark

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According to http://www.plastiquarian.com/vulcanit.htm :

Mouldings in vulcanite (hard rubber) were exhibited by both Hancock and Goodyear at the Great Exhibition of 1851.
The material is most commonly black in colour and has been used to make combs, buttons, vesta cases, jewellery, fountain pens, pipe stems (both plain and decorative), musical instruments, etc.; it was also widely used as an electrical insulator and for chemically resistant linings. A reddish colour was used for denture plates until superseded by celluloid and acrylic. A reddish material rippled with black was popular about 1930 for fountain pen and pencil barrels.
It was originally based on natural rubber but since the 1930s has been based wholly or partly on various synthetic rubbers.

Hmm.....
 
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wdcav1952

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Perhaps not exactly the same, but pretty damn close for my money.

Interestingly enough, the Vulcanite dentures were the most comfortable material ever used for dentures. They were ugly as an ex-wife, but they were comfortable.

Vulcanite - A hard rubber produced by vulcanization.

Ebonite - A relatively inelastic rubber, made by vulcanization with a large amount of sulfur and used as an electrical insulating material.

WordNet: ebonite
Top Home > Library > Literature & Language > WordNetNote: click on a word meaning below to see its connections and related words.
The noun has one meaning:

Meaning #1: a hard nonresilient rubber formed by vulcanizing natural rubber
Synonyms: hard rubber, vulcanite
 

pipecrafter

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And if you ask pipe makers, you'll get another answer entirely. The two terms are used interchangeably for the most part by pipe smokers and a lot of makers, but some high-end pipe makers only refer to the stuff sold in rod form as ebonite, while using the word vulcanite to refer to pre-formed pipe stems that are injection molded using a high amount of sulfur in the formulation.
 

DCBluesman

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Ebonite was originally a brandname for the vulcanite (rubber which is heated and infused with 30-40% sulphur) created by Charles Goodyear. So, all ebonite is vulcanite, but not all vulcanite is ebonite.

FWIW - Charles Goodyear had no connection with the Goodyear Tire and Rubber Company.
 
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