| 摘要 |
PROBLEM TO BE SOLVED: To economically suppress an increase in the surface temp. due to irradiation of sun rays without decreasing the photographic characteristics of a photographic sensitive material. SOLUTION: A cartridge body 13 consists of an upper case 11 and a lower case 12. Each of the upper case and the lower case 11, 12 is formed by injection molding of a black synthetic resin compsn. into which a light-absorbing and shielding material is kneaded. The outer surface of each case is coated with a light-reflecting material to form a white reflection layer 11a, 12a. Since the light which irradiates the cartridge 13 is scattered by the reflection layers 11a, 12a, the cartridge body 13 does not absorb heat, which suppresses the temp. increase on the surface and inside. Or, the upper case and the lower case 11, 12 may be formed by injection molding of a synthetic resin compsn. prepared by kneading a light- reflecting material with a thermoplastic resin, and then a light-absorbing layer may be formed on the inner faces of the formed bodies by applying a light-absorbing and shielding material. Or, a first synthetic resin compsn. prepared by kneading a light-absorbing and shielding material in a thermoplastic resin and a second synthetic resin compsn. prepared by kneading a light-reflecting material with a resin may be used together for injection molding in a two- color injection molding machine so that the first synthetic resin compsn. is formed as the inner face side. |
