Here's a simple formula for a 500 ml batch of liquid soap for face skin cleansing:
Ingredients:
400 ml distilled water
80 ml liquid castile soap
10 ml vegetable glycerin
5 ml jojoba oil
5 ml aloe vera gel
1 ml fragrance oil or essential oil (optional)
Preservative (follow the manufacturer's guidelines for appropriate usage)
Instructions:
Begin by sterilizing your equipment and containers to ensure cleanliness.
In a clean container, measure out 400 ml of distilled water.
Slowly add 80 ml of liquid castile soap to the water while stirring gently. This will form the base of your liquid soap.
Next, add 10 ml of vegetable glycerin to the mixture. Glycerin helps moisturize the skin.
Add 5 ml of jojoba oil and 5 ml of aloe vera gel. These ingredients provide additional hydration and nourishment.
If desired, add 1 ml of fragrance oil or essential oil to impart a pleasant scent to your liquid soap. Be mindful of any potential skin sensitivities and choose a fragrance oil that is skin-safe.
Finally, add the appropriate amount of preservative according to the manufacturer's guidelines. Preservatives help prevent microbial growth and ensure the longevity and safety of your product.
Stir the mixture thoroughly to ensure all the ingredients are well combined.
Test the pH of your liquid soap using pH testing strips or a pH meter. Adjust the pH if necessary to ensure it falls within the desired range of approximately 5.5.
Once you're satisfied with the formula and pH balance, carefully pour the liquid soap into your chosen containers.
Label the containers with the date of production and the list of ingredients used.
Remember to store your liquid soap in a cool, dry place and use within the recommended shelf life. It's always a good idea to perform a patch test on a small area of your skin before using the liquid soap on your face to check for any adverse reactions.
Please note that this is a general formula, and it's important to conduct your own research and perform stability and compatibility tests to ensure the safety and efficacy of your specific product.
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