| 摘要 |
PURPOSE: To provide a low cost stable packing material for photographic sensitive material having moisture resistance and light shielding property by providing >=2 layers of light reflection layers and a light absorbing layer. CONSTITUTION: The packing material for photographic sensitive material provided with >=2 layers of light reflection layer, in which 3.0-12.0wt.% light reflection material is added and the thickness of which is 82-90% of that of the total layer, and light absorbing layer, to which 1.0-8.0wt.% light absorbing material is added and the thickness of which is 10-18% that of the total layer, is formed by co-extruded film inflation method. Thus, since the packing material has >=2 layers of the light reflection layers, the ununiform thickness of the light reflection layer is eliminated, stable moisture resistance is attained and the packing material does not give adverse effect such as fogging on a film at the time of storing. And, since the quantity of the reflection material to be added to the light reflection layer is controlled, the light shielding property is increased and since the quantity of absorbing material to be added to the light absorbing layer is specified, stable light shielding property is attained. |
