DETACHABLE COLLAR

A detachable collar is a shirt collar separate from the shirt, fastened to it by studs. The collar is usually made of a different fabric from the shirt, in which case it is almost always white, and, being unattached to the shirt, can be specially starched to a hard cardboard-like consistency.
Some believe that Hannah Montague invented this collar in Troy, New York, in 1827, after she snipped off the collar from one of her husband's shirts to wash it, and then sewed it back on.[1] The Rev. Ebenezar Brown, a businessman in town, proceeded to commercialize it. The manufacture of detachable collars and the associated shirts became a significant industry in Troy.