In a message dated 10/10/1999 9:51:27 AM Eastern Daylight Time, 
jim@proscitech.com.au writes:

<<  Not surprisingly a lot of people chose thicker, high profiles blades for 
 cryostat sectioning and thinner low profile blades for sectioning at 3 or 
less 
 micrometers. >>
And another thing....
Why doesnt someone make a blade that is in a cryo-proof dispenser?  The 
blades have a fine coating of oil and if left in the cryostat (like a good 
tech should, always prepared with an extra blade, ) the oil  freezes and is 
hard to get out of the box.
Dawn Truscott
Zeiss/Microm