In the preparation of crepe rubber heavy machinery is necessary, and ample engine-power must be available.
There would seem to be no reason why crepe rubber should not be dried at a temperature of 100° F.
This darkening of crepe rubber may be attributed to a slow process of oxidation, which continues until the rubber is dry.
The block is prepared from crepe rubber, which has been dried either in a hot-air drier or in a vacuum chamber.
For this reason, crepe rubber with coloured spots may give rise to trouble in the factory.
crepe rubber very seldom shows the ordinary surface moulds not uncommon in sheet-rubber.
Some light is thus shed upon a subject which has puzzled both shippers and receivers of crepe rubber.
It is transferred to the crepe rubber in the manner indicated above.
The only other defect of crepe rubber which has any bearing on its use in manufacture is mould.