[Histonet] preserving hydrogel in tissue sections

[path lab]

We were asked to perform histology on goat knee joints (fixed in 10%NBF) to
demonstrate a polymeric material - hydrogel.  Could someone please share
their procedure or direct me to someone who could help me?   I couldn't
find much information using PEG and are open to using other methods. We
would like to preserve the hydrogel for microscopic evaluation if at all
possible.

Thanks in advance.