In 1954, Tropicana founder Anthony T. Rossi pioneered a technique for flash pasteurising juices which allowed him to sell unfrozen, not-from-concentrate orange juice. Flash pasteurisation involves elevating the temperature of freshly squeezed juice for 15 to 30 seconds, killing bacteria and ensuring extended shelf life. As of 2010, Tropicana sells 16 varieties of not-from-concentrate orange juice in its Pure Premium line. Tropicana uses three types of oranges from orchards in Brazil and Florida.
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The Valencia orange is the world's most widely planted orange. A member of the sweet orange family, the Valencia was named for the city of Valencia, Spain. It was first introduced to Florida in 1870. The Valencia is slightly oblong in shape and 2.7 to 3 inches in diameter, with a peel of moderate thickness. Commercially seedless, Valencia oranges mature in early February and stay on trees well into the summer.
Another sweet orange, the Hamlin orange emerged by accident in 1879, a chance seedling of Florida attorney and orchard owner Arthur George Hamlin. The Hamlin orange is small and globe-shaped, with a smooth and pale rind. The Hamlin has very few seeds and is a popular orange for juice production because its peel is prone to splitting and cracking, making it too unsightly for commercial fruit selling. The Hamlin's commercial harvest season runs from October to January.
Named for its delicate pineapple fragrance, the Pineapple Sweet orange originated in the Florida orchard of Reverend J.B. Owens around 1860. About the same size and shape as the Valencia--though more spherical than oblong--the moderately seeded Pineapple Sweet orange is known for its bright reddish-orange colour and sensitivity to frost. The Pineapple Sweet orange has a winter harvest season, maturing in December.
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