8-10 minutes without the (stopcock closed/weight on the pipe) with a good stead stream of steam is what you want. Then (close the stopcock/put on the weight) and for PF style 1/2 pints, 20-25 minutes is fine @ 15psi.

For other substrates, especially natural sources and with larger jars you want to bump the time upwards of 45 mintues - 1 hour.

With agar medias for petri dishes you want the lower time periods to prevent caramelization of the sugars/malts.

party on garth!

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