Stearic Acid helps to harden products, such as candles and soap bars, helping the latter to create a rich lather that feels velvety. This property makes it ideal for use in shaving foams. With occlusive properties, it helps the skin remain hydrated by preventing or slowing moisture loss from the skin’s surface.
Can I add stearic acid to soap?
Stearic acid is a great addition to soap recipes if you’d like to create an extra firm bar of soap. It’s usually used as a thickening agent in lotion. It’s a vegetable derived waxy substance that can be used at a 0.5% of your oils in cold process soap.
How do you Saponify stearic acid?
Historically, stearic acid has been made by a process known as hydrolysis, which involves heating the fat in an alkaline solution. This process is also known as saponification. The alkali that is traditionally used is sodium hydroxide, also known as caustic soda or lye.
How do you prevent stearic acid in soap?
Some tips for preventing stearic spots.
- Soap at warmer temperatures if you are soaping below 85 °F. If your soap is full of oils high in stearic/palmitic acid then you might even consider soaping a bit higher, such as at 100 °F up to 120 °F.
- Melt your solid oils first until completely melted. Then add your liquid oils.
What does myristic acid do in soap?
Myristic is a saturated fatty acid that contributes hardness, cleansing, and fluffy lather. A lot of exotic oils contain high amounts of myristic acid, such as Murumuru Butter, Tucuma Seed Butter, Monoi de Tahiti Oil, and Cohune Oil.
Is stearic acid harmful to skin?
All of the experts we spoke with agree that stearic acid is a safe ingredient typically well-tolerated by any skin type. That being said, Petrillo points out that any ingredient always has the potential to trigger an allergy or reaction.
Which acid is used in soap?
Acids commonly added to soap include lemon juice (citric acid), vinegar (acetic acid), and yogurt (lactic acid). Adding these acids complicate the soap making process, because they react faster and more easily with NaOH or KOH than fatty acids can react.
What does lauric acid do in soap?
The Lauric Acid creates a foaming soap when saponified. This is a key attribute of soaps – and so a blend of oils is normally used to create a soap that foams, but that is also not too hard or too soft.
Why is my homemade soap turning white?
If you make cold process soap, there’s a good chance you’ve gotten soda ash. It creates an uneven, white, ashy film on the bars. Soda ash forms when unsaponified lye reacts with naturally-occurring carbon dioxide in the air. It doesn’t affect the final bars and the soap is safe to use.
Which oils Saponify faster?
More saturated oils (like coconut and palm oils which are solid at room temperature) tend to saponify more quickly than less saturated oils such as olive oil.
How do you make stearic acid soap?
Historically, stearic acid has been made by a process known as hydrolysis, which involves heating the fat in an alkaline solution. This process is also known as saponification. The alkali that is traditionally used is sodium hydroxide, also known as caustic soda or lye. Hence the term “lye soap.”
What is the coefficient of saponification for soap?
On saponification charts for soapmaking the values are given as coefficients (numbers) that can be used with any weight unit you choose. For each oil you will have one coefficient for KOH (potassium hydroxide aka caustic potash) and another one for NaOH (sodium hydroxide aka caustic soda).
What are the 8 fatty acids in soap?
The eight fatty acids that make up our soap molecules include four saturated fatty acids- myristic, lauric, palmitic, and stearic, and four unsaturated fatty acids- ricinoleic, oleic, linoleic, and linolenic. Each fatty acid is saponified and creates a sodium or potassium salt of a fatty acid or a soap.
What is a saponification chart and do I need one?
Now we need a saponification chart. A saponification chart is a list of oils and fats and their respective SAP (saponification) values. On technical data sheets saponification values are expressed as milligrams of KOH per gram of oil.
