Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA...
Transcript of Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA...
![Page 1: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/1.jpg)
Overview of USDA HVI Cotton Classification Standards and
Qualification Materials
![Page 2: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/2.jpg)
USDA HVI Cotton Classification Standards and Materials for Calibration
Universal HVI Cotton Calibration Standards
– For Strength, Length & Uniformity Index
– 2 categories: Long/Strong & Short/Weak
– Used for HVI calibration of Length, Strength, Uniformity Index measurements only
![Page 3: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/3.jpg)
USDA HVI Cotton Classification Standards and Materials for Calibration
USDA Pima HVI Calibration Cotton Standards
- For Strength, Length & Uniformity Index
- 2 Categories: Long/Strong & Short/Weak
- Used for HVI calibration of Length, Strength, Uniformity Index measurements only
![Page 4: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/4.jpg)
Universal HVI Micronaire Cotton Calibration Standards
– 2 categories: High (Au) & Low (Gu)
– Used for HVI calibration for Micronaire measurement only
USDA HVI Cotton Classification Standards and Materials for Calibration
![Page 5: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/5.jpg)
HVI Color Calibration Tiles
– Instrument specific calibration tool, not a standard
– Set of five tiles
– Used for HVI calibration of color Rd and +b
USDA HVI Cotton Classification Standards and Materials for Calibration
![Page 6: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/6.jpg)
Trash Calibration Tile – Full patterned tile
– Instrument specific calibration tool, not a standard
– Used for HVI calibration of trash percent area and trash particle count
USDA HVI Cotton Classification Standards and Materials for Calibration
![Page 7: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/7.jpg)
8x8 Evaluation Cottons
• For Strength, Length & Uniformity Index
• 8 categories covering Upland Length/Strength range - Categories:
8x8 – 31 8x8 – 35
8x8 – 32 8x8 – 36
8x8 – 33 8x8 – 37
8x8 – 34 8x8 – 38
• Used for qualification of HVI testing level for Length, Strength, Uniformity Index on each HVI instrument
USDA HVI Cotton Classification Standards and Materials for Annual Qualification
![Page 8: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/8.jpg)
International Calibration Cotton Standards
- For Micronaire only (6 types covering range)
- Types: Am, Gm, Cm, Im, Dm, Bm
- Used for qualification of HVI testing level for micronaire on each HVI instrument
USDA HVI Cotton Classification Standards and Materials for Annual Qualification
![Page 9: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/9.jpg)
Universal HVI Cotton Color Standards
– For Rd/+b Color
– 12 cotton samples representing broad color range with standard reference values for Rd/+b
– Used for qualification of HVI testing level for Rd and +b on each HVI instrument
USDA HVI Cotton Classification Standards and Materials for Annual Qualification
![Page 10: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/10.jpg)
USDA HVI Trash Standards
– For trash percent area and trash particle count
– 12 images of cotton samples under glass representing broad trash range with standard reference values percent area and particle count
– Used for qualification of testing level for percent area and particle count on each HVI instrument
USDA HVI Cotton Classification Standards and Materials for Annual Qualification
![Page 11: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/11.jpg)
Production of HVI Classification Standards and Qualification
Materials
![Page 12: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/12.jpg)
Production of Standards
Prepared Annually:
200+ Sets of Color Tiles
200+ Trash Tiles
100+ Color Check Boxes
50+ HVI Trash Standards
20,000+ kg of Cotton
for Calibrating HVI Length,
Strength, Uniformity and
Micronaire Prepared Annually
![Page 13: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/13.jpg)
Production of HVI Cotton Standards
• All USDA HVI cotton calibration standards traceable to USDA master reference cottons
• Bales selected based upon USDA classification data for potential calibration standard
• Values established through intense testing processes
![Page 14: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/14.jpg)
Production of HVI Cotton Standards
Value Establishment Process
• Selected bales tested by minimum of 6 HVI instruments in multiple labs
• Minimum of 120 test repetitions for each bale to establish values
• Bale results must meet strict level and variability guidelines to be approved as a standard
![Page 15: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/15.jpg)
Production of HVI Color/Trash Materials
• USDA HVI color and trash standards traceable to USDA master reference cottons.
• USDA color and trash calibration materials traceable to USDA master reference cottons.
• Values established using master colorimeter/ master trashmeter
![Page 16: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/16.jpg)
Production of HVI Color/Trash Materials
Value Establishment Process
• Each tile/ cotton tested for 4 repetitions at 4 orientations
• Measurements for each tile/cotton must meet allowable variability tolerances
• Values established based on the average of the 4 measurements
• Established values are verified
![Page 17: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/17.jpg)
Utilization of Testing Tolerances
![Page 18: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/18.jpg)
Understanding the Nature of HVI Data
Important Points:
- HVI data is statistical in nature
- Even the best HVI data has an accepted level of variability (error)
- Statistical tolerances are required in all areas of HVI data handling and use
- Examples where tolerances are used on HVI data:
- Calibration, Qualification, QA, Round Testing, Marketing, Mill laydowns, etc.
![Page 19: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/19.jpg)
Utilization of Testing Tolerances
• What is a testing tolerance?
– Range of acceptable error
• Why are tolerances needed?
– Inherent variability of cotton
– Inherent variability of instrument
• Tolerances vary for testing functions based on the number of test repetitions
![Page 20: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/20.jpg)
Utilization of Testing Tolerances
• USDA maintains multiple levels of testing tolerances.
– Calibration
– Annual Qualification
– Retests
![Page 21: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/21.jpg)
Utilization of Testing Tolerances
Calibration Tolerances
• Purpose:
– Establish accurate instrument testing level
• Most restrictive testing tolerance
• Calibration verification based on 12 comb repetitions for length, strength, uniformity index
![Page 22: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/22.jpg)
USDA Testing Tolerances
Calibration – Micronaire 0.10
– Strength 0.50
– Length 0.007
– Uniformity 0.70
– Color Rd 0.40
– Color +b 0.40
– Trash Area 0.05
– Trash Particle Count 5.00
![Page 23: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/23.jpg)
Utilization of Testing Tolerances
Annual Qualification Tolerances
• Purpose:
– Evaluates precision and accuracy based on multiple reference cottons with established values and low standard deviations
• Based on 8 repetitions per standard cotton/ qualification material
![Page 24: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/24.jpg)
USDA Testing Tolerances
Annual Qualification
Mean Standard Deviation
• Micronaire 0.11 0.1
• Strength 1.30 1.00
• Length 0.015 0.012
• Uniformity 0.90 0.80
• Color Rd 1.0 0.70
• Color +b 0.5 0.30
![Page 25: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/25.jpg)
Utilization of Testing Tolerances
Retest Tolerances
• Purpose:
– Evaluates range of data between two sides of individual cotton samples
• Based on comparison of data collected for each side of the sample (i.e. comb to comb data comparsion)
![Page 26: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/26.jpg)
HVI Testing Tolerances
Retests
– Strength 5.0
– Length 0.075
– Uniformity 5.0
– Color Rd 7.0
– Color +b 2.0
– Trash Area 0.50
– Trash Particle Count 50
![Page 27: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/27.jpg)
Overview of USDA Physical Classification Standards
![Page 28: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/28.jpg)
Universal Grade Standards
15 physical standards
10 descriptive grades
5 below grade
![Page 29: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/29.jpg)
Universal Grade Standards
7 of the 15 physical grade standards serve as standards for both color and leaf
![Page 30: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/30.jpg)
Universal Color & Leaf Grade Standards
White
Light Spotted
Spotted
Tinged
Yellow Stained
Good Middling 11* + 12 13 -- --
Strict Middling 21* + 22 23* 24 25
Middling 31* + 32 33* 34* 35
Strict Low Middling 41* + 42 43* 44* --
Low Middling 51* + 52 53* 54* --
Strict Good Ordinary 61* + 62 63* -- --
Good Ordinary 71* + -- -- -- --
Below Grade 81 82 83 84 85
* Physical Standards for color grade. All others are descriptive. + Physical Standards for leaf grade.
![Page 31: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/31.jpg)
• Physical Grade Standards are valid from July 1 through June 30 of each year
– Cotton changes color over time, the color accuracy of the cottons in grade standards diminishes with age
– Inevitable loss of integrity with repeated use
• USDA, AMS, Cotton Division produces 3000 Universal Upland and ~ 240 Pima boxes each year in to supply the demands of the domestic and international cotton industry.
Grade Standards Production Process
General Information
![Page 32: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/32.jpg)
Standard represents bottom range of color
1 2 3
4 5 6
Grade Standards Production Process
![Page 33: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/33.jpg)
Assembling the Practical Forms
– Select up to 6 bales per grade standard
– Selections based on appearance and color chart readings
Grade Standards Production Process
![Page 34: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/34.jpg)
Production of Practical Forms
Grade Standards Production Process
![Page 35: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/35.jpg)
Interpretation of Universal Grade Standards
Leaf grading
• Official level is only represented in the white grade standards
• Each “biscuit” within the leaf standard represents the maximum amount of leaf contained within the grade
![Page 36: Overview of USDA HVI Cotton Classification Standards and ...cotton.tamu.edu/Harvest/Overivew of USDA HVI Cotton Classification... · USDA HVI Cotton Classification Standards and Materials](https://reader030.fdocuments.us/reader030/viewer/2022021501/5aa42ff67f8b9ab4788b82d9/html5/thumbnails/36.jpg)
Interpretation of Universal Grade Standards
Color Grade
• Standard represents the bottom range of color within each grade
1 2 3 4 5 6