Bulletin Volume 230-240

Bulletin Volume 230-240

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...the preceding operations. Whatever the source of the moisture it is necessary to forastall any fermentation likely to arise from it by firing as soon as the leaf is ready for that process. This is now accomplished in most countries which produce commercial teas by the use of drying machines. Tins machine (fig. 7) may be briefly described as an inclosed series of trays with movable bottoms, on winch the moist tea leaves are exposed to a blast of heated air forced up through the apparatus. As conducted at Pinehurst, the operation consists of spreading the leaf on the sliding top tray of a 42-inch drier and pusliing it into the drying box, where it meets a current of heated air (230 F.), which is drawn through the apparatus by a powerful fan. After a minute or two it is dropped through the turning slats of woven-wire cloth, winch constitute the floors of the trays, onto the tray immediately below. This is done three times, by which time, tliree or four minutes after the beginning of the firing, the greater portion of the moisture in the leaf has been dissipated. Then the top tray is loaded with another charge of wet leaf and shoved into the drying box and the first charge dropped on the bottom tray to remain there until it feels only slightly moist to the hand. Br this system the leaf with the larger'content of water is introduced into the top of the drying box and the moisture borne away without being condensed on any leaf above it. The leaf here loses its soggy condition quite rapidly, a state always regarded as destructive of flavor, and very little moisture rises from it by the time another tray is introduced above it. Although only two of the five trays are in use at any time, the more rapid dissipation of the moisture by this process...
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Product details

  • Paperback | 192 pages
  • 189 x 246 x 10mm | 354g
  • United States
  • English
  • black & white illustrations
  • 1236738632
  • 9781236738639