Posted by Ben C on 07/08/07 22:51

On 2007-07-08, dorayme <doraymeRidThis@optusnet.com.au> wrote:
[...]
> Anyway, about MW, I did and do use them a bit when I am feeling
> cautious. After pouring boiling water into the jar as described
> with the milk powder, the temp, of course, drops to the 80's.
> Sometimes I then stick the jar with a bit of plastic wrap in the
> MV, get a bright torch focussed onto the top of the jar and let
> it roll. The water quickly boils and sends the white mass
> bubbling up and you must quickly turn off. I do this a few times
> and then whip it out, put fresh wrapper on top and leave to cool.
>
> The problem with your using the MW to heat from scratch and then
> cool is controlling the boil so it does not go everywhere

Once you've figured out how long it takes it always takes about the same
time, although you do still need to keep an eye on it during the last
few seconds.

> and knowing when it gets down to the 40s without contamination.

I don't have a thermometer so that's all guesswork anyway. There again
once you have an idea of how long it takes to cool down by about the
right amount you just always leave it for that long.

> I do recommend my recent discovery to you (the algorithm at
><http://tinyurl.com/ywvlg5> with some pictures now), the key
> ingredient being the jar in the flask idea. I regard this
> discovery as being in the same league in its own way as Kekule's
> discovery by way of a dream of the molecular structure of
> benzene.

Yes that is a clever idea, in particular because you can seal it all up
from contamination while it's still hot and not have to open the jar
again.

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