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Delustrant

A delustrant is a substance that reduces the lustre (sheen) of synthetic fibres. The most common delustrant is anatase titanium dioxide. Synthetic fibres such as nylon are normally extremely shiny and transparent when extruded. Adding powdered titanium dioxide causes the surface of the fibres to be rougher, reducing the sheen, at the same time, being opaque, it reduces the transparency of the fibre. To be effective as a delustrant, titanium dioxide must be powdered 0.1-1.0 ┬Ám, depending on the size of the fibre, and varying amounts (up to about 2%) can be used depending on the level of lustre required. Some of the words used to describe different lustre levels are: clear, bright, semi-dull, semi-matt, dull, matt, extra dull, and super dull

References

"green air" © 2007 - Ingo Malchow, Webdesign Neustrelitz
This article based upon the http://en.wikipedia.org/wiki/Delustrant, the free encyclopaedia Wikipedia and is licensed under the GNU Free Documentation License.
Further informations available on the list of authors and history: http://en.wikipedia.org/w/index.php?title=Delustrant&action=history
presented by: Ingo Malchow, Mirower Bogen 22, 17235 Neustrelitz, Germany