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Abstract

As a prelude to studying drying characteristics of wool in superheated steam, wool yellowing in that medium at short exposure times at various temperatures is measured with an apparatus that reduces uncertainties in time/temperature exposure conditions. This has led to a useful database of wool yellowing characteristics at various temperatures, times, and moisture conditions, which extends the information formerly available. The data from these experiments are generally consistent with other data in the literature, given the experimental uncertainties inherent in most of the latter. The magnitudes of yellowing changes are not sufficiently great to disbar superheated steam drying of wool, even though drying will be confined to temperatures where drying rates (though still acceptably high) will be below those in air at comparable temperatures.

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References

Barker, A.M. , Autoclave Setting of Carpet Yam: Yellowness Index and Set, WRONZ Communication no. 22, 1973.

Butcher, P.W. , and Ross, D.A. , The Use of Sulphur Dioxide to Eliminate Wool Yellowing during Steam Treatments , WRONZ Communication no. 23, 1974.

Davidson, A.N. , Setting Creases in All-Wool Fabrics by High Pressure Steam without the Use of Reducing Chemicals, in " Proc. 3rd Int. Wool Text. Res. Conf., Paris," vol. III, 1965, pp. 565-576.

Duffield, P.A. , and Lewis, D.M. , The Yellowing and Bleaching of Wool, Rev . Prog. Color. 15, 38-51 (1985).

Gläser, D. , Experimentelle Untersuchungen zur Heiβdampftrocknung, Melliand Texnlber. 77 (9), 610-613 (1996).

Hausbrand, E. , "Das Trocknen mit Luft und Darnpf," Springer Verlag, Berlin. 1908.

Keey, R.B. , and Wu, Y. , An Experimental Study on Drying Characteristics of Scoured Loose Wool, Research Report, Dept. of Chem. & Proc. Eng., Univ. of Canterbury , New Zealand, 1988.

Lennox, F.G. , A Spectrophotometric Study of Yellowing in Wool Fabric, J. Textile Inst. 51, T1193-T1213 (1960).

MacLaren, J.A. , and Milligan, B. , "Wool Science," Science Press, Australia, 1981, pp. 76-87.

10.

O'Dell, D.R. , and Carr, W.W. , Effect of Humidity on the Drying Rates of Carpet Tiles, Textile Res. J. 66 (6), 366-376 (1996).

11.

Schwartze, J. , Colour Changes in Wool due to Short Treatment with Superheated Steam, WRONZ report. 1997.

12.

Schwartze, J.P. , An Experimental Investigation into the Drying of Wool Fibre Mats with Superheated Steam, WRONZ Report R215, July 1998.

13.

Schwartze, J.P. , McKinnon, A.J. , and Höcker, H. , Experimental Investigation of the Through-drying of Fibrous Mats with Superheated Steam , in "Drying 98," A.S. Mujumbar , Ed., ZITI Editions, Thessaloniki, Greece, 1998, pp. 1637-1644.

14.

Thompson, B. , and Whiteley, K.J. , The Visual Perception of the Colour of Scoured Wool , J. Textile Inst. 77 (4), 284-287 (1986).

Wool Color Changes in Superheated Steam

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