Titanium foil, 0.0127 mm thick, 99.8%

Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density and high strength.

T 0917 (OTTO) Titanium foil, 0.0127 mm thick, 99.8% Cas 7440-32-6 - used in making of the camera shutters, a most unseen and unknown device hidden inside a camera that allows light to pass for a short period of time, for the purpose of exposing film or an electronic sensor to light to make a photo.