生地の水蒸気の通しやすさを評価する試験の一つ。規定のカップに塩化カルシウム(吸湿材)を入れ、3mmの区間をあけて生地の試験片で密封する。一定の条件下で放置し、試験片を通過して塩化カルシウムが吸湿した水蒸気量を測定して透湿度を算出する。
生地の水蒸気の通しやすさを評価する試験の一つ。規定のカップに塩化カルシウム(吸湿材)を入れ、3mmの区間をあけて生地の試験片で密封する。一定の条件下で放置し、試験片を通過して塩化カルシウムが吸湿した水蒸気量を測定して透湿度を算出する。
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