シルクスクリーン印刷検査環境
（1）光度：200〜300lx（距離750mmの40W蛍光灯の明るさに相当）。
(2) The surface of the product needs to be inspected, which is about 45 degree with the inspector's visual direction, and the time is about 10s.
(3) The distance between the inspector's visual direction and the surface of the product to be inspected is as follows, A-level surface: 400mm, B-level surface: 500mm, and C-level surface: 800mm.
