The average typing speed is 38-40 words per minute (wpm) for adults  in a professional working environment (despite many incorrect  reports on the web that it is 50-60 wpm).
Chronic Health Effects The following chronic (long-term) health effects can occur at some time after exposure to Mica and can last for months or years: Cancer Hazard * Some Silicas have been shown to cause cancer in animals. The risk of cancer in humans from Mica is unclear at this time.
This is why I use very little Mica in all of my foundations and the Mica is always treated with Methicone. For the most part, mineral makeup is about applying the essential minerals like Titanium Dioxide and Zinc Oxide to the face in order to achieve the proposed healing treatment for the skin.his is why I use very little Mica in all of my foundations and the Mica is always treated with Methicone. For the most part, mineral makeup is about applying the essential minerals like Titanium Dioxide and Zinc Oxide to the face in order to achieve the proposed healing treatment for the skin.