10.0/10 (45 評論)
Wow, I Can't Believe I Ever Shopped For chalk Elsewhere, CJ
... Heinrich Schultz (1724): a silver and chalk mixture darkens under exposure to light. However...would be almost 150 years before technology caught up to the point where this was possible. Early photographic...
分類：家用電器 > 相機 2006年12月09日