article_snippet.sent: But since pinhole cameras aren't designed to last a thousand years, Keats made Keats of copper because of copper resistance to corrosion.
article_snippet.sent: The pinhole Keats pierced through a rugged 24-karat gold plate.
article_snippet.sent: To capture the exposure, Keats adapted a Renaissance art technique by using rose madder, a sturdy, organic-based oil paint, applied directly to the copper in the back of the camera.
article_snippet.sent: Keats hasn't sought a patent for the device, which Keats estimates costs about $100 in raw materials to build, saying Keats wants others to copy a patent for the device, which he estimates costs about $100 in raw materials to build and place others own millennium cameras strategically around the world. '
article_snippet.sent: I'm well overstating the case for their own millennium cameras,' Keats concedes. '
article_snippet.sent: I realize (a patent for the device, which he estimates costs about $100 in raw materials to build) may seem like a supreme act of egotism.
article_snippet.sent: Keats also gave 100-year cameras to some resident of Berlin, Germany, last year, Keats told Big Think.