本机适用白色或浅色鞋用帮材和底材在特定波长光照射下耐黄变程度的试验。根据浅色和白色材料或制品在特定波长长时间照射下易发生颜色变黄的原理,本机以灯泡及加热控温装置模拟自然的环境照射试样,在规定时间内,观测试样表面颜色发生变化情况,以确定试样的变色程度,从而判定试样在辐射下耐黄变的能力。 This machine is designed for testing the yellowing resistance of white or light-colored shoe upper materials and sole materials under specific wavelength light exposure. Based on the yellowing mechanism of light-colored and white materials or products, it simulates various lighting effects for testing.