Unverified85% confidenceDecision RuleTime unknown
防晒衬衫的防晒能力主要靠织物密度和后整理，浅色(白/浅蓝)UPF普遍低于深色，同款深色比浅色UPF高一个等级，怕晒选深色更稳
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Unverified防晒速干衬衫看UPF值，UPF40+才有实际防晒意义，UPF50+能阻隔98%以上紫外线；但真正防晒力来自织物密度和后整理，浅色薄款即使标UPF50实测也常缩水，深色或密织更可靠87% similarUnverified浅色速干T恤的防晒指数通常低于深色同款，白色UPF往往只有15-20，户外防晒优先选深色或标注UPF50+的浅色（需额外添加抗紫外整理剂）87% similarUnverified深色（藏蓝/黑/深灰）面料本身防晒系数比浅色高，浅色速干衫若无化学防晒涂层，实际UPF可能不足3087% similarUnverified防晒本质靠织物密度和涂层，深色（黑/藏青/深灰）比浅色防晒性能高，同款UPF标称下深色实测紫外线阻隔更稳定，怕晒黑优先选深色86% similarUnverified防晒能力主要靠面料织密度和防晒剂涂层，深色面料的防晒性通常优于浅色，同款黑色比白色UPF值高一个档位；追求防晒优先选深色而非浅色86% similar
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