The material typically used for the pages was parchment, which is animal skin that's stretched and dried under tension, so it become s really flat and can be written on.

It thus hugs a swimmer's body like a second skin; indeed, when it is not being worn, it does not lie flat but has a shape to it.

Pineapple contains bromelain and other active substances, on human skin blood vessels have a certain stimulus occurs soon after eating some flat itchy skin, limbs, tongue numbness.