This book shows the basic homemade vegetables soap recipes use a few natural ingredients in each recipe, beside the main ingredients like lye, water and oil or fat. That means all soaps are totally natural smell and colors based on the original ingredients. Anyway, you can add scents or essential oils and pigment colors as you wish and also every recipe is flexible to applied. Using vegetables in the soap making process is the use of vegetables purees or juices in the lye solution, or you can even use the whole vegetable by mash it or ground it and add in the soap and let it steep to allow the essence and nutrients of the vegetables to seep into the solution, giving it color scent and skin care benefits. It is not necessary to add a preservative to cold process soaps when using purees or juices. The high pH of cold process soap inhibits most microbial growth if the ingredients used are high quality initially.