When burning a teaspoon of sulfur on a charcoal disk, a small puff of smoke appears as the powder quickly disappears, afterwards leaving only a lingering haze of smoke and that pleasant smell of lit matchsticks.
Minutes later I am usually tempted to dump more sulfur on the charcoal in order to intensify the effect.
I do this a couple of times until the room is pervaded by smoke, then after some time, maybe half an hour later, the windows are opened to create a draft which will dissipate the fumes and partially remove the odor. Afterwards, an incense is lit to mask any lingering odor.
I would like to know if burning a teaspoon of sulfur is enough to purify a small room or if it is better to keep the charcoal burning longer and to add more sulfur at intervals like I have been doing?