Saltpetre is often sprinkled on, in making cigars, to improve their burning.
From the theatlantic.com
Saltpetre Cave is dry, dirty and quite chilly, with temperatures in the 40s.
From the courier-journal.com
Saltpetre, potassium nitrate, is added to food to give meat products a nicer colour.
From the scienceblogs.com
His formulation comprised nitrolignose impregnated with saltpetre or barium nitrate.
From the en.wikipedia.org
It was a form of nitrolignose impregnated with saltpetre or barium nitrate.
From the en.wikipedia.org
After saltpetre has been dried, it may become moist again if left over a period of time.
From the en.wikipedia.org
Apparently King's Sutton was a local centre for saltpetre excavation and digging at the time.
From the en.wikipedia.org
In about 1547 Paolo Giovio wrote that the ceiling was being damaged by saltpetre and cracks.
From the en.wikipedia.org
The East India Company traded mainly in cotton, silk, indigo dye, saltpetre, tea, and opium.
From the en.wikipedia.org
More examples
Potassium nitrate: (KNO3) used especially as a fertilizer and explosive
The common name for potassium nitrate. It is used to preserve food especially meat in which it produces a characteristic bright pink colour. It is used to make brine in combination with salt and sugar. Numerous meat products are cured using saltpetre including pastrami and knackwurst
Latin Pottasium Nitrate; a key ingredient of gunpowder.