Does anybody know what this is?

I don't really know what to call this but I am looking for a membrane or 
type of paper that is used to orient biopsy specimens. When you put the 
tissue sample on the membrane it sticks so that the specimen can be 
oriented properly. Both can go through processing and be cut.
The endoscopy techs used this in a hospital where I once worked for their 
tiny colon bx. specimens.
I don't really want to use it for tissue but to hold together collagen 
fibers so they can be sectioned. I tried histogel for this but it had 
marginal results.
Thanks!!
Andi
.....................................................................
: Andrea Grantham, HT(ASCP)     Dept. of Cell Biology & Anatomy     :
: Sr. Research Specialist       University of Arizona               :
: (office:  AHSC 4212)          P.O. Box 245044                     :
: (voice:  520-626-4415)        Tucson, AZ  85724-5044    USA       :
: (FAX:  520-626-2097)          (email:  algranth@u.arizona.edu)       :
:...................................................................:
           http://www.cba.arizona.edu/histology-lab.html