I realize this is an old thread, but since it was already bumped up and I was curious about the use of these stamps, I thought it would be okay to post.
The clear stamps (the ones that you can mount on acrylic) are not deemed to be food safe. This is the e-mail I got today from the supplier:
Thank you for your interest in Inkadinkado! Unfortunately, our products are not tested to be food safe, so I do not recommend them for that use. I apologize for the inconvenience. Please let me know if you have further questions. Have a great day and a Happy New Year!
It's curious though that they are sold on Global Sugar Art.
I have some of the stamps and used them on fondant for cupcakes, (which thankfully were just for playing around and ended up in my freezer).
I love the designs though. So, today I rolled out some fondant and then topped it with saran wrap (yes, it's FOOD SAFE!!!) and then used the stamper. It worked well. When I peeled off the saran, I was pleased with the result. The lines may not be 'quite' as sharp as when using the stamp without saran, but you'd have to have both samples side by side to notice a difference.