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While breeders report fiber can sell for US$2 to $4 per ounce, the world wholesale price for processed, spun alpaca "tops" is only between about $10 to $24/kg (according to quality), i.e. about $0.28 to $0.68 per oz. [19] Finer fleeces, ones with a smaller diameter, are preferred, and thus are more expensive.
Given the linear density and weight the yarn length can be calculated; for example: l/m = 1693 × l m /Nec × m/kg, where l/m is the yarn length in metres, l m /Nec is the English cotton count and m/kg is the yarn weight in kilograms. The following length units are defined. Bundle: usually 10 lb (4.5 kg)
The number of wraps will act as a gauge to assess the thickness of unmarked yarn; for example 12 wraps per inch is 12 WPI, and is used to calculate how much yarn is required for various articles, [3] so that 12 is equivalent to 8 ply (worsted weight, medium weight) yarn.
A sack of coal was 16 stone, or 224 pounds (102 kg), while the weight of a sack of wool depended on who was selling it. A sack of grower's wool was 3 + 1 ⁄ 4 hundredweight or 364 pounds (165 kg), whereas a sack of dealer's wool was considerably lighter, at 240 pounds (109 kg). [11]
Alpacas are typically sheared once per year in the spring. Each shearing produces approximately 2.3 to 4.5 kilograms (5 to 10 pounds) of fiber per alpaca. An adult alpaca might produce 1.4 to 2.6 kilograms (50 to 90 ounces) of first-quality fiber as well as 1.4 to 2.8 kilograms (50 to 100 ounces) of second- and third-quality fiber.
Bales should weigh between 110 kg (243 lb) and 204 kg (450 lb), unless the wool is under 18.6 microns, in which case they may be a minimum gross weight of 90 kg (198 lb). Bales that weigh less than 110 kg (243 lb) are known as a butt and those over 204 kg (450 lb) will not be sold at auction without repacking at the vendor's expense.
A wool with an average fiber length of 2–4 cm is obtained every other year. The weight of shorn wool hairs per animal is about 250 g every two years [9] to 450 g, [1] after removal of unwanted guard hairs from the down hair. [1] Before processing, the down hair is separated from the guard hair by sorting.
Cotton Counts: Refers to the thickness of the cotton yarn where 840 yards of yarns weighs 1 pound (0.45 kg). 10-count cotton means that 8,400 yards (7,700 m) of yarn weighs 1 pound (0.45 kg). This is coarser than 40-count cotton where 40x840 yards are needed.