Ingredient Effects on Texture, High Concentration Safety, and Sunscreen Compatibility
Asked by: blue_monkey_in_suit
On: March 20, 2015
Product Type:
Cosmetics
Question
I have a few questions regarding ingredient usage and formulation:
- What are the effects of adding Amino Silk and LipidSoft to a formulation, specifically concerning texture (smooth, soft, oily/greasy, lightweight, non-greasy)?
- Is using Matte Silica at a concentration of 10% in a lotion/cream base considered safe for the skin? Is this concentration considered too high for a standard base, and how does it affect the texture and oil absorption properties?
- Is it recommended to use Ethoxydiglycol in a formulation that also contains chemical sunscreens? What are the safety considerations or reasons behind this recommendation?
Answer
Based on the replies provided in the conversation, here are the answers to your questions:
Adding Amino Silk and LipidSoft:
- Amino Silk will make the texture feel smoother and softer on the skin.
- LipidSoft, although not a traditional oil, is an ester and contributes to an oily/greasy feel. Adding it might make the texture less lightweight and non-greasy, potentially counteracting your goal.
Matte Silica 10%:
- From a safety perspective, 10% Matte Silica is generally safe and doesn't harm the skin, though using too much might absorb excessive skin oil.
- From a formulation perspective, 10% is considered a high concentration compared to typical general-purpose creams or lotions from major brands. Brands usually use lower amounts for broader appeal across different skin types. Whether it's "too much" for your specific texture and oil absorption needs depends on testing it on your skin, but it's on the higher side for a standard lotion/cream base.
Ethoxydiglycol and Chemical Sunscreens:
- It is not recommended to use Ethoxydiglycol with chemical sunscreens.
- While there isn't specific research proving this combination is dangerous, studies indicate that chemical sunscreens themselves can potentially cause harm if used excessively, and Ethoxydiglycol is known to enhance the penetration of substances into the skin. Combining a substance that enhances penetration with ingredients that might be harmful if absorbed excessively is best avoided until clear research confirms its safety.