A stainless crock pot with a removable ceramic liner and 2 large stainless steel stock pots are my mainstays for the liquid soap making process. (Fig 1)

Fiq 1 - Mainstay pots for liquid soap making
Using my favorite recipe, which has been carefully calculated for the proper amount of distilled water, lye (potassium hydroxide), and hard/soft oils I weigh out the distilled water and lye first. Don’t be alarmed, all soap making requires a type of lye in order to produce soap, but the finished product does not contain any active lye. The lye is sprinkled over the water and allowed to dissolve while I measure out the hard/soft oils required and add the oils to the crock pot. The oils are heated to melt temperature and the lye water is added to the oils and mixed.
The water/oil mixture will begin to “trace” and thicken. It will begin to look like what is often called vanilla pudding. The next stage the mixture will move into is what looks like applesauce and is commonly referred to as the “applesauce stage”. As the mixture continues to cook, it will begin to look like you are making mashed potatoes. The final stage of the cooking process, which may take several hours, is what is referred to in the soaping world as the “Vaseline” stage because it actually resembles gooey Vaseline.

Figure 2 - the vaseline transparent stage
As the pots are heating, I measure out the dilution water and heat it separately. To the heated dilution water, I add Hydroxyethyl Cellulose (HEC) and vegetable glycerin, then mix until the heated water and HEC become a clear gel. This clear gel is added to the smaller stainless pot and the transparent soap paste is then added (Fig 2). I choose to use HEC, which is a thickener widely used in the pharmaceutical and cosmetic industry, because each batch of liquid soap will consistently remain the same thickness, or viscosity.

Figure 2 - transparent soap paste in gel
The smaller stainless pot is covered and when the water inside the larger pot has heated to almost boiling, the heat is reduced or shut off under the larger pot. I check the inside pot regularly and give it a little stir now and then. The dilution phase will take several hours to complete. When the soap paste has completely dissolved, (Fig 3) I will then add a preservative, and/or coloring, and scents.

- Figure 3 – completely dissolved and finished liquid soap
Melanie McCullough 7/31/09 – all rights reserved
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on August 19th, 2009 at 10:46 p
Good content, I will be back to read more