petri plates?

Owl 102644.2132 at CompuServe.COM
Sun Nov 23 14:38:46 EST 1997

Dry materials can be autoclaved fast-exhaust, but you'll need to 
slow-exhaust the agar.  Also, if you are doing quantities >1 
liter, you will need to increase the autoclave time in order for 
the center of the vessel to get up to temperature.
(My rule of thumb is 20 minutes for 1 - 2 liters, 30 minutes for 
3 - 4 liters, 60 minutes for 5 liters, and anything bigger should 
probably not be autoclaved if you really need it sterile.)

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