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...

FAQs

does AWTA retain core samples for check testing? Does AWTA have a test for chemical residues in wool? Can AWTA test other fibres? Wool Testing What are the main benefits of Staple Length & Strength Measurement? For Staple Measurements how is the...

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

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...

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

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...

Dark & Medullated Fibre Risk Scheme

and price premium for more than one hundred years because it produced wool tops with low levels of dark and medullated fibre contamination. Recently, early and later stage processors of Australian wool have noticed increased occurrences of dark and...

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

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

The Effect of Histogram Class Interval on the Calculation of Mean Fibre Curvature & Standard Deviation of Fibre Curvature

Dark & Medullated Fibre

The Dark Fibre Testing service offered by AWTA is targeted at white-wool growers who are attempting to manage contamination from exotic sheep breeds, or who wish to monitor the contamination in lots carrying a high risk of contamination. Two...

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

Update on Fibre Curvature Measurement

μm and 18.73 μm with associated curvature results of 80 and 69 0/mm respectively. While there has been no change in the fibre diameter measurement results for LASERSCAN or OFDA we have seen a shift in the uncertified curvature data. The curvature...

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%...

Fleece Measurement

wool 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...

Electronic Services

to 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...

Accreditation

performance 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...

Fibre Diameter Report 2015 05

What are the Limits to Wool Fibre Fineness Measurement

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

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

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

Fundamental Principles of Fibre Fineness Measurement - Airflow Instrument

Effect of Fibre Medullation on Laserscan Diameter Measurement

The Influence of Preparation Techniques on the Measurement of Fibre Curvature

Standardisation of Mean Fibre Curvature Using the Series 14 IH Calibration Top - Calibration Derived for Minicored Scoured-Wool

Standardisation of Mean Fibre Curvature Using the Series 14 Calibration Top as a Reference

Measuring Fibre Curvature - Key Issues

Fibre Curvature Morphometry & Measurement

Evaluation of Alternative Methods for Fibre Curvature Measurement on NZ Wools

An Objective Technique for Measurement of Fibre Crimp Curvature - Part 1 - Metrology

Wool Industry - Working Together to Future Proof Our Fibre

Five leading Australian wool industry groups are jointly working to develop a mechanism that sets the industry up for success into the future. Australian Council of Wool Exporters and Processors (ACWEP), Australian Wool Exchange (AWEX), Australian Wool...

IWTO Combined Certificates & OMLs

measurement 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...

Specialty Fibre Request 2018-19

Fact Sheet - Adjustments to Fibre Curvature Measurement

A Review of the Distribution of Fibre Length in Tops

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

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

Specialty Fibre Test Request (Alpaca, Mohair, Angora, Cashmere)

Fact Sheet - Fibre Curvature

OFDA4000 - A New Instrument for Simultaneous Measurement of Fibre Length & Diameter in Tops

Foundations & Metrology of the Almeter Wool Fibre Length Measurement

Update of Progress in Dark & Medullated Fibre Risk Project

The Precision of Dark & Medullated Fibre Testing of Noil

Status Report on Dark & Medullated Fibre Testing of Presale Core Samples and Review of the Detection Threshold

Relationship Between Greasy & Processed Dark Fibre Contamination from DAMARA Crossbred Lambs in Merino Wool

Preparation & Dark Fibre Contamination

Managing the Risk of Dark & or Medullated Fibre Contamination

Fibre Medullation, Marketing & Management

Detection of Pigmented & Medullated Fibre in Core Samples of Commercial Sale Lots from Merino Ewes Mated to Damara Fat Tail Rams