AW: [Histonet] Paraffin Blocks Cracking

[Gudrun Lang]

I've read somewhere (?), that too slow hardening is the culprit for
sprinkled blocks. I can also imagine, that the type of paraffine and special
additives can make a difference.
Our coolplate is set at -10°C and had never problems with cracking paraffin.

I think it's similar to freezing. The faster the freezing the smaller the
ice-cristals.

Gudrun

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Von: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] Im Auftrag von Brian
foster
Gesendet: Mittwoch, 04. Jänner 2012 18:34
An: histonet <@t> lists.utsouthwestern.edu
Betreff: [Histonet] Paraffin Blocks Cracking

Hello all,


 I am studying for my HTL and have a question that has been a problem for me
and was wondering if anyione out there can help. "What cuases paraffin
blocks to crack ?" So far i have come up with it has to do the crystal
formation during cooling, and I have seen some Histonet articles that say
the block cooling plate at the embedding may be too cold ( less than -5 C).
Can anyone confirm that is the is the correct cause of the problem?
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