A single accelerator or a mixture of accelerators may be used. In the compositions described herein, these vulcanization accelerators are usually used in amounts of from 0.3 to 2, for example from 0.3 to 1.5, preferably from 0.4 to 1.0 and more preferably from 0.5 to 0.8, parts by weight per 100 parts by weight of rubber.
from plants. One well-known example is hot-water extraction used to make coffee, teas, and soup stocks. Solvents such as alcohol can also be used such as to make liquid extracts used in food flavorings and perfumes. Cold-pressing with fats and waxes can be used for compounds sensitive to heat such as jasmine. The best extraction method to