vulcan's Usage Examples:

House industry is still widely diffused in Milan itself, especially as regards working in gold, silver, vulcanite, bronze and leather.

In order to make spongy or porous rubber, some material is incorporated which will give off gas or vapour at the vulcanizing temperature, - such as carbonate of ammonia, crystallized alum, and finely ground damp sawdust.

which they retain; and hollow articles, such as playing balls or injection bottles, are vulcanized in iron or brass moulds, tinned inside and very slightly greased.

Most articles made of cut sheet rubber would, however, be of very limited utility were they not hardened or vulcanized by the action of sulphur or some compound of that element.

The last phase of vulcanicity took place along the great meridional rifts of East Africa, and though feebly manifested has not entirely passed away.

When a manufactured article has been saturated with sulphur in the melted sulphur bath, the heat necessary for vulcanization may be obtained either by highpressure steam, by heated glycerin, or by immersion in a sulphur bath heated to about 140° C.

Sulphur when warmed with caoutchouc combines with it, and on this fact the vulcanization of rubber depends, and also the production, with an excess of sulphur, of the hard black material known as vulcanite or ebonite.

A kind of vulcanite which contains a large proportion of vermilion or other mineral pigment is used, under the name of dental rubber, for making artificial gums and supports for artificial teeth.

Flanged joints are made to bolt together on washers of vulcanized rubber.

Sheets sulphured in this way can be made up into articles and joined together either by warming the parts to be united, or by means of indiarubber solution; after which the true vulcanization, or " curing," as it is termed, can be brought about in the usual way.

4 VenationIn order to make spongy or porous rubber, some material is incorporated which will give off gas or vapour at the vulcanizing temperature, - such as carbonate of ammonia, crystallized alum, and finely ground damp sawdust.

Another method of vulcanizing articles made from cut sheet rubber consists in exposing them to the action of chloride of sulphur.