When coffee reached North America during the colonial period, it was initially not as extraordinary as it had been in Europe. During the Revolutionary War, however, the demand for coffee increased so much that dealers had to hoard their scarce supplies and raise prices dramatically; this was partly due to the reduced availability of tea from British merchants. After the War of 1812, during which Britain temporarily cut off access to tea imports, the Americans' smack for coffee Keurig Brewer grew, and lank demand during the American Civil War together with advances in brewing technology secured the position of coffee as an everyday commodity in the United States.
During roasting, caramelization occurs as intense torridness breaks down starches in the bean, changing them to simple sugars that begin to brown, changing the color of the bean. Sucrose is rapidly lost during the roasting channels and may disappear entirely in darker roasts. During roasting, ambrosial oils, acids, and caffeine weaken, changing the flavor; at 205 ðC (400 ðF), other oils start to develop. Singular of these oils is caffeol, bogus at about 200 ðC (392 ðF), which is largely responsible for coffee's aroma and flavor.