I have been intrigued with silica, but have never used it in formulation. I bought Aerosil 200 more than a year ago, experimenting with it as a EO fixative, but never made any (noticeable) headway in that area.
As I have been working on some face creams and hand creams, I am needing to enhance some mattifying aspects without diminishing the the texture, in fact hoping to enhance the texture while reducing shine.
Textures are already very good...so texture is the least of my concern, other than doing something that would downgrade the texture.
So I have a sample of Greensil from Greentech on the way....and Aerosil 200 in hand. I suspect these two products will perform in a similar manner, and only their feedstock differs? I am looking to reduce gloss on the skin with the consideration of adding silica.
I should say...I already use mattifiers such as arrowroot, Polymethylsilsesquioxane, some crosspolyers etc. Possibly I am not using them at high enough rates, but I am still looking to reduce skin gloss a tiny bit.
So mainly...I would like to hear from those who have used Silica....The in's and out's of using them...and especially inclusion rates...and techniques....such as time of inclusion, and if the phase of the emulsion matters. At what minimum inclusion rate does one start to realize an enhanced matte finish?
Also any elaboration on how adding said amount of silica...will change the feel of an emulsified cream would be appreciated.
Is there any negative consumer perception with adding silica to an INCI?