After some hunting on the internet, I did find the ingredient list for the "frosting paper" sold by KopyKakes.
INGREDIENTS: Water, glucose syrup, corn starch, microcrystal cellulose, sorbit, glycerin, microcrystal cellulose & CMC, starch syrup, locust bean gum, titanium dioxide powder, glucose syrup powder solid, methyl cellulose, potassium sorbate.
- Titanium dioxide powder sounds ominous but it is used as a whitening agent (often used in toothpaste as well)
- Sorbit is a sugar substitute
- microcrystal cellulose & CMC and methyl cellulose are used in pills and such stuff since makes the material compressible into either pills or, in this case, paper