Predicting Processing Results of Sale Lots. Part 2: Development of a Sale Lots Formula for Hauteur

Abstract

Some wool types have been shown to process differently to their predicted Hauteur values when the TEAM-2 and proposed TEAM-3 processing prediction equations were used (Fish et al., 2004). In particular, top processed from sale lots of 100% Stretchy Bellies and Bellies process consistently longer to how they were predicted. The aim of this paper was to improve the Hauteur prediction performance of these wool types by introducing some new measurements to the regression equation.

Five raw wool parameters (Decrimped Staple Length, Energy, Decrimped Staple Strength, Decrimped Staple Length Ratio and Mean Fibre Curvature) were investigated for their potential benefit in the Hauteur prediction of hard-to-predict wool types. Parameters were included to complement the TEAM-3
recommended Hauteur equation, while providing some level of “correction” for some extreme wool types. The Decrimped Staple Length Ratio (RATIO) was found to improve the predictive capability of the TEAM-3 recommended equation for sale lots where the RATIO value was greater than 1.30. Other parameters provided little to no improvement in the predicted Hauteur of hard-to-predict wool types.

It is recommended that the industry consider including a modified Decrimped Staple Length Ratio in the industry TEAM-3 formula for predicting Hauteur to provide a better calculated Hauteur for Bellies and Stretchy Bellies wool types.

Citation

"Predicting Processing Results of Sale Lots. Part 2: Development of a Sale Lots Formula for Hauteur", V.E. Fish, T.J. Mahar and J.W. Marler, Report RWG 04, Technology & Standards Committee, Raw Wool Group, Shanghai Meeting, November 2004