Fiber Properties

Fiber Properties

MIC
unit
Micronaire (MIC) is a measure of the air permeabilty of compressed cotton fibers. It is often used as an indication of fiber fineness and maturity. Micronaire readings of 37-42 are premium, 35-36 or 43-49 are base, and 34-and-under or 50-and-higher are discount. Micronaire is measured using the HVI® line.
LEN
32/in
Staple Length is the average of the longest 50% of the fibers (Upper Half Mean Length). It is measured in 100th's and in 32's of an inch. For the conversion chart, see the USDA's Classification of Cotton. Length is measured by the HVI® line.
LUI
(%)
Length Uniformity Index (LUI) is the ratio (given as a percent) of the average length, to the upper-half-mean-length (see adjacent description). LUI is an indicator of how fibers will perform in the spinning of yarn. LUI is measured using the HVI® line.
STR
g/t
Strength (STR) reports the force, in grams, required to break a bundle of fibers one tex unit in size. A tex unit is the weight in grams of 1,000 meters of fiber. For more information, see the USDA's Classification of Cotton. Strength is measured on the HVI® line.
TRASH
(%)
Trash content is a measure of the non-lint particles (like leaf, bark) in the cotton. It is given as the percentage of surface area occupied by trash when a cotton sample is scanned by a camera. Trash is also measured by the HVI® line.
LGRD
INDEX
Leaf grade index (LGRD) is a measure of the overall grade of the cotton. It is a weighted average of the bales in each leaf category. The weights were adjusted in 1998, so values given after this date will be slightly higher in relation to values from comparable data in past years.
NO.
BALES
Lists the total number of bales classed so far this season.
LEN
inch
Length as defined in the LEN 32/in column, only represented in inches.
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