美国霍里森斯(Horizons)公司金属照相材料(Metalphoto)子公司生产了一种用铝板作为支持体的银盐感光材料,商品名称叫“阿尔福特”(アルフォト)。这种产品耐磨擦、耐腐蚀,作为路标、指示牌露天停放,虽经日晒风吹雨打,画面颜色仍经久不褪。阿尔福特主要是由铝板、氧化膜和卤化银组成的(见图1)。氧化膜使铝板平滑面 Horizons Metalphoto, a subsidiary of the United States, manufactures a silver salt light-sensitive material using an aluminum plate as a support under the trade name of “Arfuttel”. This product is abrasion-resistant, corrosion-resistant, as a signpost, signs parked in the open air, although the wind and rain, the screen color is still lasting fade. Alfred is mainly composed of aluminum plate, oxide film and silver halide (see Figure 1). The oxide film makes the aluminum plate smooth