The type of soap Grandma made is called "Cold Process" soap (commonly referred to as Canzana CBD Oil Cold process soap making is a science as well as an artistic endeavor. Cold process soap is created by combining lye (sodium hydroxide) with fatty acids. Grandmother did not have the luxury of using the wide variety of fatty acids available to soap makers today which can be nearly any type of oil. She may have used Cannabidiol Oil or beef tallow.