Used only a few times in a tea ceremony class. I've used a few sheets of kaishi paper, but there are many remaining. I don't see any noticeable stains, but there may be some overlooked. Please refrain from purchasing if you are concerned. Since I don't plan to use them, I'd like to give them away to someone who needs them rather than dispose of them. Please consider this item, understanding that it is old and has been inspected and stored by a non-professional. I will ship them compactly, and may change the shipping method to Yuu Yuu Mercari.