woal
1. «przezroczysta, cienka tkanina z silnie skręconej przędzy»
Bawełniany, jedwabny woal.
Suknia z woalu.
Zasłony z woalu.
[SJP]

voile
n.
U tk. woal.
[Kościuszko]

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Note added at 28 mins (2005-01-09 17:02:20 GMT)
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\"Voile
Fibre: Cotton - also wool and called \"Voile de laine\".
Weave: Plain, loosely woven.
Characteristics: Sheer and very light weight. Usually made with cylindrical combed yarns. To obtain a top quality fabric, very highly twisted yarns are used.\"
http://www.ntgi.net/ICCF&D/cotton.htm#voile

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Note added at 1 hr 20 mins (2005-01-09 17:54:37 GMT)
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\"Chiffon
Fibre: Silk, rayon, cotton, synthetics
Weave: Plain
Characteristics: Lightweight, sheer, transparent. Made with very fine, tightly twisted yarns. The tightly twisted yarns could be either in the filling or the warp or both. It is very strong, despite filmy look. Wears very well. It is very difficult to handle when sewing and it is best to baste the pieces over tissue to make it easier.\"
http://www.ntgi.net/ICCF&D/silk.htm#chiffon

Jak widać ten słownik tkanin również podaje definicję szyfonu dosyć podobną do definicji woalu. Podobną, ale jednak nieidentyczną. Z czego tylko wynika, że są to dwie podobne, ale nie tożsame tkaniny.