Wafer Papers for Baking - 100 round 70mm papers by Kuchle

These are edible?

How long will these stay fresh? Had to purchase a pack of 2 because the single packs were not available at the time.

What kind of starch is used? I have a family member who gets an itchy rash when she eats any corn. I need to know all of the ingredients, in detail.

Are these Kosher