A dense water-based slurry of magnesium hydroxide and magnesium acetate is forced through a small hole in a metal plate.
On exposure to air it solidifies sufficiently to make a thread which is shaped into the required form.
When exposed to a hot flame, a basket made of this composite gauze would burn away the acetate, leaving a brittle but serviceable magnesia (magnesium oxide) basket behind as the mantle.
Charles Lungren subsequently patented[3] a support mechanism which allowed such fragile baskets to be employed more easily.
Clamond filed a related patent[4] which deals with production, storage, and transport-proofing mantles.