0 past simple and past participle of fume
1 to be very angry, sometimes without expressing it:
Various gelling agents are added to give it this property such as aminated bentonite, metallic soaps, or fumed silica.
Other species may also be fumed but usually will not darken as much as white oak.
Most commonly, the silicone oil is polydimethylsiloxane and the thickener is amorphous fumed silica.
Fumed colloidal silica can be added to help with the workability of the resin.
Fumed silica is generally accepted as safe as a food additive and is frequently used in cosmetics.
For this reason wood that is to be fumed for a particular project is often taken from the same tree.
Early research used an expensive additive called fumed silica, an amorphous form of silica made by combustion of silicon tetrachloride in a hydrogen-oxygen flame.
It can also be hydrolysed to fumed silica.
