We went ahead and did the science for you...that is those of you who were on the fence. We submitted our cellophane for Fourier Transform Infrared Spectroscopy - the same technique used by Smith et al for analysis at Purdue University's material science division.
As you can see below, the orange spectrum absorbance peaks representing CelloVet are consistent with the peaks found in the reference libraries for cellophane reported in Smith's paper from Veterinary Surgery in 2013.
So there you have it. You can be certain it is cellophane when you are using CelloVet.