I thought the sheet would be more paper but it's more plastic, probably the ink will run but it's transparent as the description says

They only work with ball pens, with ink and gel no (you can let it dry, but it takes longer). Arrived in 20 days in Spain

I was hoping you could write it with a pen in the post-it without it being deleted, but with perm it runs out of trouble.

Perfect transparent posits for use in books or notes. You can write about them and you clearly see what's underneath!

Cool transparent notes. I love them, fast shipping and well packed. They're perfect for taking notes.