Accelerated Aging & Color-stability Testing of Heat-colored Films
热着色膜的加速老化与色稳检测
标签：加速老化, QUV, 盐雾, 色稳定性, 检测
30–50 nm 干涉色膜对膜厚极其敏感——继续氧化增厚 5 nm 色相即整体偏移，因此热着色件出厂前应做老化矩阵：恒温恒湿 40 °C/95% RH 240 h（查膜层继续生长）、中性盐雾 240 h（查点蚀）、QUV 500 h（查封护层粉化）。实测经验：未封护紫铜火焰色在湿热箱内 ΔE 可达 6–10，硬蜡封护后 <2，硅烷 + 蜡复合 <1.5。验收判定一律以封护态样件为准，未封护数据仅作机理参考。
A 30–50 nm interference film is hypersensitive to thickness — a further 5 nm of growth shifts the whole hue — so run an aging matrix before release: 40 °C/95% RH for 240 h (film growth), neutral salt spray 240 h (pitting), QUV 500 h (sealer chalking). Typical results: unsealed flame colors drift ΔE 6–10 in humidity, hard-wax sealed <2, silane-plus-wax <1.5. Always judge on sealed coupons; unsealed data is for mechanism study only.