/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: LyeCastro https://cdn.slidesharecdn.com/profile-photo-LyeCastro-48x48.jpg?cb=1523028725 Lye is a corrosive alkaline substance, commonly sodium hydroxide (NaOH, also known as 'caustic soda') or historically potassium hydroxide (KOH, from hydrated potash). Previously, lye was among the many different alkalis leached from hardwood ashes. Now, lye is commercially manufactured using a membrane cell method.