pearl ash การใช้

At that time, it was known as potash, pearl ash, pearlash, or alkali.
This consisted of a copper vessel of 3 gallons of pearl ash ( potassium carbonate ) solution contained within compressed air.
In late 18th century North America, before the development of baking powder, pearl ash was used as a leavening agent in quick breads.
As early as 1767, potash from wood ashes was exported from Canada, and exports of potash and pearl ash ( potash and asheries in operation in 1871.
Wood ash and pearl ash ( potash mixed with lime ) were shipped overseas as early as 1767 and export reached a peak in the mid-19th century.