和紙についた鉛筆の汚れを落とす方法(How to remove pencil stains from washi paper) https://otonabijin.tokyo/2023/01/19/%e5%92%8c%e7%b4%99%e3%81%ab%e3%81%a4%e3%81%84%e3%81%9f%e9%89%9b%e7%ad%86%e3%81%ae%e6%b1%9a%e3%82%8c%e3%82%92%e8%90%bd%e3%81%a8%e3%81%99%e6%96%b9%e6%b3%95%ef%bc%88how-to-remove-pencil-stains-from-washi/