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:
“People do not know the natural infirmity of their mind: it does nothing but ferret and quest, and keeps incessantly whirling around, building up and becoming entangled in its own work, like our silkworms, and is suffocated in it: a mouse in a pitch barrel.”
—Michel de Montaigne (1533–1592)