Re: color at 150 degrees C ?
It is surprising the difference it makes I would suggest that 150 degrees C corresponds to CS2
I got some commercially roasted beans a week or two ago.
I dont think I will do that again.
I would agree that typically unless you slow the roast that 150C is passed quite quickly.
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Re: color at 150 degrees C ?
Geez - I dont know what to say :-[Originally posted by 444F4E7F4E4149524E200 link=1308225753/6#6 date=1309057457Can you get sex in a coffee cup?
Or have I just been doing it wrong.
I guess youve nailed it then!
/Kevin
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Re: color at 150 degrees C ?
what dose it taste like?
Can you get sex in a coffee cup?
Or have I just been doing it wrong.
everything else I have roasted before just seems like instant coffee it was that bad by comparison.

Now it is that much better.
I just hope I can achieve this again. [smiley=thumbup.gif]
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Re: color at 150 degrees C ?
I tried 2 beaches yesterday with the candy thermometer it seems that at about 125C the beens start to swirl freely in the popper.
I would guess at this temperature a lot of the water has evaporated
the temperature seems to change quite quickly after this at about 150 the beens are starting to change color and that a large variation in color this could be that the individual beans are at slightly different levels of roast.
At this stage O stated shaking the popper vertically so the beans float in the updraft high enough that they nearly came out this seemed to slow the browning part of the roast that often happens very quickly.
after tis the beans were roasted in the popper as usual.
My initial impression is that the harsh flavors of freshly roasted coffee seem less.
there is a lot less chaff in the groove of the bean
the final volume of beens seems a little more.
the roast is quite even in color.
what dose it taste like?
I suppose if I am doing it properly that is a question for Saturday. :-?
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Re: color at 150 degrees C ?
I was fishing though my wifes cooking gadgets and found a candy thermometer (it goes up to 200 C)
I dont think she has ever made candy ;D
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Re: color at 150 degrees C ?
Hey Petanque - for me, the start of the Maillard reactions is when the beans transition from the yellow to slight tinges of brown showing.
The problem is that the roast has a bit of "momentum" so by the time you actually see the colour change, the temperature has already gone past the start point...
To get a bit of a slow down in the Gene, I just turned the heat setting down when the roast reached the right spot. This was done by time (the thing is solidly repeatable) and eye. Seemed to work well enough.
Now that Ive roasted more than 100kg of beans in 250g batches :
I feel less concerned about "wasting" a batch and playing about is certainly the way to learn what changes you can bring about...
Cheers
/Kevin
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Re: color at 150 degrees C ?
150 - This is when the Maillard reaction begins (and runs through to about 180) - this is a browning reaction that occurs after the drying phase. At the end of drying the beans look yellowish. They are just starting to darken at 150.
Get the DMM. You will then learn more about the stages of the roast, controlling the temp rise at certain points with your roaster, prevent stalling, and learn how profiles determine what you taste.
Once you have the DMM get Andys profile software and you will see it in action and can repeat a roast you like.
Then, you will need a bigger roaster......
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Re: color at 150 degrees C ?
Hi petanque,
Jaycar has one for $39.95 (QM1602), the one on South Road is close to you.
The Coffeesnobs DMM is probably your best bet though, especialy if you are going to keep roasting, Andys software is very good and the support here is great if you need it. I know they are out of stock at the moment but they are usualy back in fairly soon and I think are worth the wait.
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color at 150 degrees C ?
on another thread it is mentioned slowing the temperature rise at 150 to 160 degrees can change the mouth feel and flavor of the coffee.
does 150 to 160 degrees correspond to a certain color of the beans?
alternatively any advice on budget thermometers?
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