This used to be a common problem years ago. It is due to crud buildup on the metal. Boil them with TCP for half an hour, then thoroughly wash them in cold water. Coat them with a VERY light smear of glycerol before you use them, preferably each time. That should help.

Bryan Llewellyn.

Diane Satterfield via Histonet wrote:
We are using large metal molds to embed mouse brains.  We are having a hard 
time getting to block out of the molds, the paraffin blocks are sticking.  
Sometimes they are coming out cracked.  Sometimes the cassette comes off the 
paraffin block.  Any idea why this is happening? Any advice on how to fix this 
problem?


Diane L. Satterfield, BS
Manager Brain Tumor BioRepository
Research Program Leader
Duke University Medical Center
Brain Tumor Center Biorepository and Database

diane.satterfi...@duke.edu<mailto:diane.satterfi...@duke.edu>
office  919-684-4642
pager  919-970-7328
fax  919-684-4975

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