Research papers

by IWTO-19-85(E) Summary of the Trial Which Established The Equation For Calculating The Australian Carbonising Yield Fibre Diameter The Relationship between New Zealand Merino Fleece Measurement Produced at NZPAC Ltd & their Corresponding Core...

Yield & Fibre Diameter

AWTA Raw Wool's key service is the independent sampling, testing and certifying of the Yield and Fibre Diameter of greasy wool before it is sold. Prior to the measurment of Yield and Fibre Diameter, a representative sample must be obtained. A core...

FAQs

(Hauteur) of the processed product to be predicted from the objective measurements of Yield, Vegetable Matter, Mean Fibre Diameter and Staple Length & Strength taken on greasy wool. Objective measurement also enables growers to receive equitable payment...

Commercial Implications of the Coefficient of Variation of Fibre Diameter on Measuring Mean Fibre Diameter

Effect of Fibre Relaxation on The Mean Fibre Diameter & Fibre Diameter Distribution Measured by Laserscan & OFDA

Effect of Snippet Length & Fibre Relaxation on the Mean Fibre Diameter, Fibre Diameter Distribution & Fibre Curvature

Implications of the CVD of Fibre Diameter on Measuring Mean Fibre Diameter

Fibre Diameter Profile - May 2015

A comparison of the Australian wool clip fibre diameter profile for the season-to-date (July 2014 – May 2015) with the equivalent period last season shows some interesting changes. The volume of ultrafine wool 16.5 microns and finer has fallen by 19%...

Raw Wool Laboratory Equipment

The NextGen Laserscan The measurement of wool fibre diameter can be conducted through four distinct methods as delineated by the International Wool Textile Organisation (IWTO). AWTA Ltd employes the IWTO-12 Laserscan fibre diameter analyser method for...

Relationships Between Mean Fibre Diameter Measurements by Airflow, OFDA & Laserscan for South African Wools from Different Breeds

The Relationship Between Mean Fibre Diameter Measurements by Airflow & Laserscan for South African Wools

Use of Variable Test Specimen Mass when Measuring Mean Fibre Diameter by Airflow

Fibre Diameter Report 2015 05

Electronic Services

mills detailing their performance against key characteristics such as Hauteur, Romaine, Top & Noil Yield, and Core/Comb Fibre Diameter. Participation in TOPMARK is free. Simply contact us and agree to provide greasy wool and top test results on...

Fibre Diameter Distributions

Fundamental Principles of Fibre Diameter Measurement

Importance of the CVD of Fibre Diameter in Selecting Tops

Understanding Fibre Diameter Measurement - Fundamental Concepts

Using Image Analysis to Measure Fibre Diameter Distributions

Using Photometry to Measure Fibre Diameter Distributions

Using Porosity to Measure Fibre Diameter

“Sirolan-Laserscan” Certification of Mean Fibre Diameter - Commercial & Technical Implications

“Sirolan-Laserscan” Certification of Mean Fibre Diameter - Technical Supplement

The Effect of Conditioning Time on Mean Fibre Diameter Results

Mathematical Combination by Subtraction of Measured Fibre Diameter Distributions of Greasy & Scoured Wool

Mathematical Combination of Measured Fibre Diameter Distribution Histograms for Greasy & Scoured Wool

IWTO Combined Certificates & OMLs

ranges. Combination Calculations Fact sheets illustrating the procedures defined in IWTO-31 for combining Mean Fibre Diameter, CVD and Fibre Diameter Distributions are available for download. The IWTO-31 standard establishes the combination procedures...

Volume and Trends

tested and associated objective measurements. As almost every lot of wool sold in Australia is certified for Yield and Fibre Diameter before sale, and because the certification services available since 1991/92 have been solely provided by AWTA, this...

Brochures and Handbooks

The processes dicussed include: Presale Test Certificate procedure Yield measurement Major Vegetable Matter types Fibre Diameter measurement Staple Length & Strength measurement Colour measurement Fleecemeasurement Test certificates & reports Download:...

Seasonal conditions hold back wool production

as a decline in the volume of 20 to 26 micron wool. Volumes have increased for other micron ranges. The average mean fibre diameter for the season to March was 21.1 micron, up by 0.1 micron. Victoria, Tasmania and New South Wales all recorded a lift in...

Testing the Wool Clip - Chinese

The Effect of Between Fibre Coefficient of Variation on the Fibre Fineness Measured by Airflow

5 Micron Fibres Found in an Ultrafine Grower Lot - Implications for Diameter Distribution Measurement

Certification of Standard Deviation of Diameter of Raw Wool Measured by OFDA

Comparison of Diameter Measurement Technologies from Interwoollabs International Round Trials for Wool Tops

Effect of Cell Snippet Position on Laserscan Diameter Measurement

Effect of Fibre Medullation on Laserscan Diameter Measurement

The Measurement Precision & Evaluation of the Diameter Profiles of Single Wool Fibres

Dark & Medullated Fibre

broker or wool selling agent before their lots are sampled for certification for Yield, Vegetable Matter Base and Mean Fibre Diameter. Find out more: Dark & Medullated Fibres - How does it work Dark & Medullated Fibres - The facts about testing

Accreditation

to the International Wool Textile Organisation (IWTO) and through participation in interlaboratory trials for Fibre Diameter and Fibre Length in wool tops conducted by Interwoollabs. AWTA is: Licensed by International Wool Textile Organisation (IWTO) to...

Australian wool production to lift a little in 2017/18

for other micron ranges, with substantial percentage increases for wool broader than 28.5 micron. The average mean fibre diameter for the season to November was 20.8 micron, up by 0.1 micron. Victoria, Tasmania and Queensland have all recorded a 0.3...

Drought continues to push Australian wool production lower

in key wool test parameters since April. Average yield ended the season at 63.1%, down 1.5% on 2017/18 while mean fibre diameter was down by 0.5 microns to 20.5 micron and staple length was down 2.2 mm. The season ending levels of these three key test...

Fleece Measurement

that are taken from individual sheep are submitted by sheep breeders and wool growers for the routine measurement of Fibre Diameter (micron) using a Laserscan instrument. This instrument provides other data in conjunction with the Fibre Diameter result,...

Australian shorn wool production forecast of 324 Mkg greasy in 2023/24

to be 4.53 kg greasy, down 2.2% compared to 2022/23. AWTA key test data for the season to date show no change in mean fibre diameter (20.8 microns) or vegetable matter (2.2%), a 2.1 mm decrease in staple length to 87.5 mm and a 0.6% reduction in yield...

Calibrating Laserscan for Raw Wool Measurement & an Evaluation of an Alternative Transport Fluid

Comparison Between Measurement of 'Dry' & 'Conditioned' Wool Samples in a Water Filled Laserscan

Comparison of Histograms from OFDA, Projection Microscope & Laserscan for Wool Tops

Effects of Standardising the Measurement Range on the Mean & Standard Deviation of Fineness from Laserscan & OFDA

Evaluation of the Performance of OFDA2000 Instrument Operating in OFDA 100 Mode

Fundamental Principles of Fibre Fineness Measurement - Airflow Instrument