| 摘要 |
PURPOSE:To improve the affinity of a support for photography to an emulsion and the adhesion to an emulsion film and to prevent uneven coating by specifying the instantaneous wettability of a gelatin underlayer with water. CONSTITUTION:A support for photography is composed of a paper base, polyolefin layers formed on both sides of the paper base and a gelatin underlayer formed on one of the polyolefin layers on the side to be coated with a photographic emulsion. The instantaneous wettability of the underlayer with water has been regulated to >=53dyn/cm. In order to improve the wettability, an anionic surfactant such as alkyl sulfosuccinate is preferably incorporated into the underlayer by 0.001-0.005wt.% of the amt. of gelatin. The affinity of the support to an emulsion at the beginning of coating with the emulsion and the adhesion to an emulsion film are improved and uneven coating and fogging due to the material forming the underlayer are prevented. |
