[Histonet] Re: Cooling paraffin blocks with ice
carl.hobbs <@t> kcl.ac.uk
Sun Sep 30 12:27:49 CDT 2012
Nice one, Joelle.
I thank you for that sophisticated paper!
Yep, wax is not JUST wax.
It indeed has a crystalline, sophisticated structure.
Yes, cutting good sections depends upon temp/speed of cutting/angle of knife/additives/effectiveness of processing.
May be more variables ...( eg: sharpness of blade, humidity)
( Them crystals "slide" over each other, with heat.....thus COLD tends to minimize compression of section: ironically, so does heat: it momentarily expands the crystals....)
I recall a paper by Edward Brain...in the 70s....proposing the addition of naphthalene to Pwax to improve penetration/cutting.
It worked very well....then we realised that this additive was...NOT an appropriate one;-)
Them were the days when we had Tea in the Lab and....smoked an occasional fag, next to the dewaxing xylene ;-)
Interestingly, there have been no reports of xylene-related fires/cancers in the ~ 100 years of xylene use.
Or, am I wrong ?
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