what is lye?

A lye is a metal hydroxide traditionally obtained by leaching ashes. This formula containing largely potassium carbonate or “potash”. in addition it includs a strong alkali which is highly soluble in water producing caustic basic solutions. “Lye” is almost an alternative name of sodium hydroxide (NaOH). Also this name historically uses for potassium hydroxide (KOH). Though the term “lye” refers to any member of a broad range of metal hydroxides.