Pitch (resin)
Pitch is a name for any of a number of viscoelastic, solid polymers. Pitch can be made from petroleum products or plants. Petroleum-derived pitch is also called bitumen or asphalt. Pitch produced from plants is also known as resin. Some products made from plant resin are also known as rosin.
Pitch was traditionally used to help caulk the seams of wooden sailing vessels (see shipbuilding). Pitch was also used to waterproof wooden containers, and is sometimes still used in the making of torches. Petroleum-derived pitch is black in colour, hence the adjectival phrase, "pitch-black".
Read more about Pitch (resin): Viscoelastic Properties, Production, "Smolny"
Famous quotes containing the word pitch:
“It is beyond a doubt that during the sixteenth century, and the years immediately preceding and following it, poisoning had been brought to a pitch of perfection which remains unknown to modern chemistry, but which is indisputably proved by history. Italy, the cradle of modern science, was at that time, the inventor and mistress of these secrets, many of which are lost.”
—Honoré De Balzac (1799–1850)