US Cotton Fiber Chart
Ratings of Fiber Properties
View a legend of how to interpret fiber property ratings for upper half mean length, fiber elongation, uniformity, fiber fineness, fiber maturity ratio and fiber strength for the fiber chart data.
| Upper Half Mean Length | |
|---|---|
| Below 0.99 | Short |
| 0.99-1.10 | Medium |
| 1.11-1.26 | Long |
| Above 1.26 | Extra Long |
| Fiber Elongation (%) | |
|---|---|
| Below 5.0 | Very Low |
| 5.0-5.8 | Low |
| 5.9-6.7 | Average |
| 6.8-7.6 | High |
| Above 7.6 | Very High |
| Uniformity Index | |
|---|---|
| Below 77 | Very Low |
| 77-79 | Low |
| 80-82 | Average |
| 83-85 | High |
| Above 85 | Very High |
| Length Uniformity Index (LUI) = 100 x Mean Length Upper Half Mean Length |
|
| Fiber Fineness (millitex) | |
|---|---|
| Below 135 | Very Fine |
| 135-175 | Fine |
| 175-200 | Average |
| 200-230 | Coarse |
| Above 230 | Very Coarse |
| Fiber Maturity Ratio | |
|---|---|
| Below 0.7 | Uncommon |
| 0.7-0.8 | Immature |
| 0.8-1.0 | Mature |
| Above 1.0 | Very Mature |
| Fiber Strength | |
|---|---|
| 23 and below | Weak |
| 24-25 | Intermediate |
| 26-28 | Average |
| 29-30 | Strong |
| 31 and above | Very Strong |
| (1/8-in. gauge strength in grams/tex) | |