Comments on: More on density

By: In the (”New”) News: « coffee

In the (”New”) News: « coffee — Mon, 08 Jun 2009 14:55:11 +0000

[...] are frequently aligned. (While you’re there, check out thoughts on lever profiles, research on density, an introductory video walkthrough of an awesome water boiler, and a complete history of [...]

By: health problems

health problems — Tue, 02 Jun 2009 07:31:29 +0000

This post have very nice info about the topic, As its early says that these are very well resources. I am agree with that.

By: facelift

facelift — Mon, 01 Jun 2009 06:28:31 +0000

Put the beans and granular material in a coarse sieve and shake out the granular material into a pan. Pour the retrieved granular material back in to the volumetric container.

By: Hotels Sydney

Hotels Sydney — Sat, 30 May 2009 04:22:26 +0000

Add a fine granular material, about 60-90 mesh, such as coarse rice flour. Tap the container to ensure that the granular material has filled all voids between the beans, then make sure that the granular material comes right to the volumetric marking.

By: free movies

free movies — Wed, 27 May 2009 09:26:10 +0000

yes it can be a good resource.i agree with you.

By: Ron Squires

Ron Squires — Sat, 23 May 2009 03:08:50 +0000

This one could be a nice resource. But the dated year seems to be old?

By: Jason Haeger

Jason Haeger — Mon, 18 May 2009 05:18:35 +0000

This doesn’t really raise any questions for me, personally. It sort of confirms what I already suspected based on repeated observations.

Isn’t the kind of roaster sort of irrelevant to the point of the quoted content?

Interesting, for sure, but better to see that there is some logic to my intuition.

By: James Hoffmann

James Hoffmann — Sun, 17 May 2009 21:30:59 +0000

You would need a specific kind of roaster for this – perhaps a centrifugal roaster or similar.

I will see if I can find some kind of info on HTST roasting online.

By: Poul Mark

Poul Mark — Sun, 17 May 2009 21:23:06 +0000

James, when you refer to 1 – 2 minutes of roasting, are you then referring to some form of flash roasting, where you just nuke it? What kind of application would employ this kind of roasting? I am now confused?

By: David Pier

David Pier — Sat, 16 May 2009 23:47:11 +0000

If you are actually looking for a method of determining the density of a particular batch of roasted beans, I can think of a method. However, it might be more complication or time than you are willing to deal with. My idea:
1. Pick out a good volumetric piece of glassware, say about 200 ml; this volume will be the variable “VC”.
2. Zero your scale with glassware.
3. Fill almost to the measurement line (doesn’t need to be exact as long as it is under the line) with the beans in question and record their mass; this will be the variable “MB”.
4. Add a fine granular material, about 60-90 mesh, such as coarse rice flour. Tap the container to ensure that the granular material has filled all voids between the beans, then make sure that the granular material comes right to the volumetric marking.
5. Put the beans and granular material in a coarse sieve and shake out the granular material into a pan. Pour the retrieved granular material back in to the volumetric container.
6. Record the volume of the recovered granular material; this is the variable “VG”.
7. The density of the beans is (MB)/(VC-VG)