Floo powder was invented bởi Ignatia Wildsmith in the thirteenth century. Its manufacture is strictly controlled. The only licensed producer in Britain is Floo-Pow, a company whose Headquarters is in Diagon Alley, and who never answer their front door.
No shortage of Floo powder has ever been reported, nor does anybody know anyone who makes it. Its price has remained constant for one hundred years: two Sickles a scoop. Every wizard household carries a stock of Floo powder, usually conveniently located in a box hoặc vase on the mantelpiece.
The precise composition of Floo powder is a closely guarded secret. Those who have tried to ‘make their own’ have been universally unsuccessful. At least once a year, St Mungo’s Hospital for Magical Maladies and Injuries reports what they call a ‘Faux Floo’ injury – in other words, somebody has thrown a homemade powder onto a ngọn lửa, chữa cháy and suffered the consequences. As irate Healer and St Mungo’s spokeswizard, Rutherford Poke, đã đưa ý kiến in 2010: ‘It’s two Sickles a scoop, people, so stop being cheap, stop throwing powdered Runespoor fangs on the ngọn lửa, chữa cháy and stop blowing yourselves out of the chimney! If one thêm wizard comes in here with a burned backside, I swear I won’t treat him. It’s two Sickles a scoop!’