✧✦Catherine✦✧ @whitequark@treehouse.systems
Public

interesting suggestions so far:

  • ZnO
  • TiO2¹
  • BaSO4
  • gold leaf

i'm going to have to look at spectrometry data and maybe run a few experiments...

¹patents.google.com/patent/BE10

BE1004752A3 - Cosmetic transparent reflective infrared radiation based on titanium dioxide rolled and use for the protection of human skin against infrared. - Google Patents

Transparent cosmetic composition reflecting infrared radiation based on titanium dioxide flakes and its use for protecting the human epidermis against infrared radiation. The invention relates to a protective composition for the human epidermis, transparent, containing in a cosmetically acceptable carrier, as an agent reflecting infrared radiation 0.5 to 10% by weight of titanium dioxide flakes of dimensions between 1 , 5 and 25 microns, dispersible in the cosmetic medium used, having a reflective (R) of infrared radiation at least equal to 45% and of which a dispersion at 2% in petroleum jelly has an optical transmission in the visible of at least 85 %. This cosmetic composition can also contain 0.5 to 20% by weight of UV-A or broadband filters.

patents.google.com

groff @geoffl@mastodon.me.uk
Public

@whitequark✧✦Catherine✦✧ 90% reflectivity for IR will be tough without sacrificing a lot of visible transparency.

"...titanium dioxide flakes with a size of 2 to 20 microns on a thickness of 0.4 to 1 micron sold under the name LUXELEN SILK D."

patents.google.com/patent/BE10

BE1004752A3 - Cosmetic transparent reflective infrared radiation based on titanium dioxide rolled and use for the protection of human skin against infrared. - Google Patents

Transparent cosmetic composition reflecting infrared radiation based on titanium dioxide flakes and its use for protecting the human epidermis against infrared radiation. The invention relates to a protective composition for the human epidermis, transparent, containing in a cosmetically acceptable carrier, as an agent reflecting infrared radiation 0.5 to 10% by weight of titanium dioxide flakes of dimensions between 1 , 5 and 25 microns, dispersible in the cosmetic medium used, having a reflective (R) of infrared radiation at least equal to 45% and of which a dispersion at 2% in petroleum jelly has an optical transmission in the visible of at least 85 %. This cosmetic composition can also contain 0.5 to 20% by weight of UV-A or broadband filters.

patents.google.com

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