ebonite
Rigid black rubber
Ebonite is a hard, dark rubber produced by vulcanizing natural rubber with high sulfur content.
The material resembles ebony in color and polish, hence the name.
Once common in electrical insulation, fountain pens, and bowling balls, ebonite has largely been replaced by modern plastics.
Also called vulcanite or hard rubber.
Darkest possible hue
- jetForced fluid stream
- glossySmooth and shiny
- polishedSmooth, refined, accomplished
- obsidianGlassy igneous rock
onyx · lustrous · sleek · smooth · shiny · dark · opaque · lacquered
Hardens permanently when heated
- polymerLarge repeated-unit molecule
- syntheticProduced artificially, not natural
- phenolicOf hydroxybenzene compounds
- bakeliteEarly thermosetting synthetic resin
celluloid · elastomer · resin · latex · molding · extrusion · compression · fabrication
Preventing heat or electricity passage
- dielectricPolarizable electrical non-conductor
- nonconductiveResists electricity passage
- durableAble to withstand use
- resilientAble to recover quickly
rigid · polishable · lustrous · dense · hard · brittle · waterproof · heat-resistant
Drilled spheres for striking pins
- fountain pensWriting instruments with internal reservoirs
- combsToothed grooming tools
- electrical insulatorsSubstances blocking current flow
- buttonsSmall disc fasteners
phonograph records · billiard balls · scientific instruments · organ stops · handles · knobs
black
Darkest possible hue
obsidian · onyx · lustrous · sleek · smooth · shiny · dark · opaque · lacquered
thermosetting
Hardens permanently when heated
- polymerLarge repeated-unit molecule
- syntheticProduced artificially, not natural
- phenolicOf hydroxybenzene compounds
bakelite · celluloid · elastomer · resin · latex · molding · extrusion · compression · fabrication · industrial
insulating
Preventing heat or electricity passage
- dielectricPolarizable electrical non-conductor
- nonconductiveResists electricity passage
- durableAble to withstand use
resilient · rigid · polishable · lustrous · dense · hard · brittle · waterproof · heat-resistant · wear-resistant
bowling balls
Drilled spheres for striking pins
- fountain pensWriting instruments with internal reservoirs
- combsToothed grooming tools
- electrical insulatorsSubstances blocking current flow
buttons · phonograph records · billiard balls · scientific instruments · organ stops · handles · knobs
ebonitenatural rubber
Elastic polymer from plants
latex · silicone rubber · foam rubber · elastomer · neoprene