| 摘要 |
PURPOSE:To avoid the disappearance of the graduations even in a long period of use, by forming a protective film on the surface of a film adsorbing plate for process camera by coating the transparent coating material and after giving the graduations. CONSTITUTION:The surface of a porous plate 2 is coated with the black coating material 6 to be dried, and then the necessary graduations 7 are provided on the plate 2 by the screen printing and other methods to be dried. Then the transparent bouble-fluid type urethane coating material 8 is coated twice and then hardened. The slightly swelled part 9 caused at the area of the graduations 7 is removed by a sandpaper or the like to be finished flat. Then a luster finishing is given to the surface turned into a mat state with the abrasives, or the transparent coating material is coated over the surface. Thus the graduations 7 can be seen clearly. |
