Black Hard Rubber (Ebonite vulcanizates) - Material to produce handicrafts - Solid black, 30-50 mm dia.

This is New Hard Rubber (Ebonite vulcanizates) in app 30 mm dia. Hard Rubber is the hardened form of rubber and sulphur. The length of each rod is approximately 220-250 mm. It can be used in Physical science, Rollers, Rulers, Pipes, Printing and writing instruments. These Rods are unpolished, though they can be polished well by the customers. All your rods will be packed in a cover or cloth packaging.

Hard Rubber Rods are softer and more crooked (uneven) than Ebonite (with surfaces untreated dark brown). If you are handling material on a lathe, it is better to use Ebonite Rods (with surfaces untreated dark brown).

Most noticeable has proved the difference in acoustics in enonite and hard rubber mouthpieces. Many of you will say « ebonite and hard rubber are not the same thing? ».

Often in the world of mouthpieces it is called « hard rubber » or « ebonite » any material other than metal. In many cases it is only plastic material derived from petroleum and therefore economic or otherwise of a composite material, mixtures of various resins and other.

The ebonite (word derived from ebony – wood) or rather the hard rubber is determined from the vulcanization process (thanks mr. Charles Goodyear!) of a mixture composed of resin rubber plant combined with sulfur and natural oils. It has excellent resistance to chemical agents, including acid and alkali as well as a very high resistance to humidity. This mixture, in the production of the bars, before undergoing the process of vulcanization is extruded at very high pressure and added to various diameters of pipes that will be in turn inserted into the autoclave for the curing process that will last a few days.

This process involves the use of pressure + heat (steam) which trigger a chemical reaction that combines the molecules of rubber with sulfur. Thanks to this reaction the elasticity and strength of the material is dramatically improved: the one that was soft rubber is now incredibly hard.

For production « no metal » mouthpieces can be used two types of ebonite: hence the distinction we make in some models between Ebonite and Hard Rubber. The production procedure is always the one described above but what we call Hard Rubber has a higher content of rubber/caoutchouc, therefore the most noble part of the product.