Comparison between Measurement of 'Dry' and 'Conditioned' Wool Samples in a Water-filled LASERSCAN

Abstract

The recent ability to use alternate transport fluids such as the water/detergent fluid mix has raised the question of the need to condition samples in a Standard IWTO Atmosphere prior to measurement in a Water LASERSCAN.

This report compares the results of samples that were dried and then conditioned in the standard IWTO atmosphere with results from samples that are dried only. The results presented are from a trial involving 3 international laboratories measuring both Mean Fibre Diameter (MFD) and Standard Deviation of Diameter (SD).

The trials conducted have shown that the measured results of both MFD and SD were equivalent when the sample was either conditioned in the IWTO Standard Atmosphere or the sample was dried and presented directly to a ‘Water’ LASERSCAN.

Recommendations have been proposed that the LASERSCAN Test Method be changed to allow wool samples to be measured in either the ‘dry’ or the ‘conditioned’ state when using a LASERSCAN filled with a water/detergent fluid mix. 

Citation

"Comparison between Measurement of 'Dry' and 'Conditioned' Wool Samples in a Water-filled LASERSCAN", D.W. Crowe and J.W. Marler, Report RWG03, Technology & Standards Committee, Raw Wool Group, IWTO, Istanbul Meeting, November 2003.