Unverified82% confidenceTradeoffTime unknown
褶皱倍数（布料宽度/杆长度）2.0倍最饱满、1.8倍标准、1.5倍偏平；倍数越高越显档次和遮光越好但用布多成本高，日常1.8倍性价比最优
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82%
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Long-term
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Unverified布宽需求=窗宽×褶皱倍数，家用标准是2倍褶（好看且遮光无缝），预算紧张最低1.8倍，低于1.5倍拉开后布料稀疏会漏光且显廉价82% similarUnverified布料宽度不等于窗户宽度：正常打褶需按窗宽的2-2.5倍买布(褶皱倍数),1.5倍以下拉开后会显得平直单薄且遮光有缝隙，计算前务必确认商家标价是'成品宽'还是'布料宽/米数'77% similarUnverified选购看单块尺寸和总数量换算单价，标称块数多但单块偏薄（<2cm）实际每块能用的次数少；厚度2cm以上的整块耐用度和性价比更均衡75% similarUnverified尺寸越大系法越多样但也越难驾驭，新手90cm方巾比140cm大方巾更好收纳打理74% similarUnverified厚度越厚（越耐穿刺）则袋体越硬、透明度差且成本升高，家用干粮储存15-18丝双面纹路已足够，无需追求20丝以上工业级厚度74% similar
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