Posts Tagged ‘pressure profiling’

Talking About Pressure Profiling

Sunday, January 17th, 2010


Is it me or is everyone else a little surprised at the lack of discussion of pressure profiling?

Most of the interesting discussion, if not just about all of it, has been over at home barista where various people are building pressure profiling units for their one group machines.  Still much of that discussion remains more about how to build it, than about desirable profiles.

Pressure profiling is undoubtedly going to become more readily available.  Though the capacities of the Slayer, the Strada and Cimbali’s new machine are all different, they are all chasing the ability to manipulate pump pressure to improve espresso.  A lot of this desire comes from the profile of espresso produced by lever machines, which have a very different pressure profile compared to a pump driven machine.

Perhaps I shouldn’t be surprised, given my own experiences with pressure profiling.  I was asked, a little while back, about why I hadn’t posted anything about it and I thought I would take this opportunity to explain:

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Predictions for 2009 – Analysis

Sunday, December 27th, 2009

Well.  I really didn’t do well this time!  Having done ok on my 2008 predictions I must say that I can’t quite claim the same level of success for 2009.

My predicitons were:

1. Coffee Packaging takes a step forward

Nothing here to report.  I don’t know if anyone has done anything interesting in 2009 with roasted coffee packaging but I certainly haven’t seen it, and I don’t think it has had an impact.  A poor prediction.

2. Improved Green Coffee Packaging

This is a tricky one.  I am sure that this year people have received record quantities of vac-packed, or grainpro packed coffee.  I know that a substantial amount of coffee that we’ve bought this year has come this way.  I also know that it leaves me conflicted over the amount of waste this packaging generates.  An OK, passable, but not great effort at prediction.

3.  Someone invents a grinder worth getting excited about.

Nope. Nothing here.  I know why, from an R&D cost Vs sales perspective, this hasn’t happened.  For some reason I guess I thought it just would.  A complete failure of a prediction.

4.  Decent Coffee Press in the UK.

I am going to claim this one.  You could argue that the quality of writing hasn’t been where it could be but I think this year we’ve seen unprecedented levels of coverage for speciality coffee – mostly in response to Gwilym’s win – but also covering the blossoming of London’s coffee culture.  I hope it continues.  A pretty successful prediction.

5.  Producing countries in the WBC Top 6.

Another utterly failed prediction.  Raul was just outside the top 6, and I think there was some surprise at who made the top 6 and who didn’t.  Nonetheless I can’t even vaguely claim this one as successful.

So…  Barely 1.5 out of 5 I reckon.  Not good work.  I shall have to try harder for my prediction for 2010, or just give up entirely!  I hope next time I don’t confuse speculation and prediction with wishful thinking!

The one interesting thing, in terms of me trying to salvage my credibility, are the two main predictions that I got wrong in 2008 – the rise of pressure profiling and increase in green coffee pricing – have somewhat come true in 2009.

There can be no argument on the pressure profiling front.  From the Slayer to Strada, but also to Cimbali’s rather impressive pressure profiling machine – the technology is now here and seems to have perhaps captured the interest of manufacturers more than baristas but I think it will continue to be incorporated into new machines.

As for green coffee – it may not yet have reached the peak of March 3rd but after a steep drop it is definitely back on the rise:

(couresy of Wolfram Alpha – the rather splendid search engine for this sort of thing.)

I’ll post my predictions for 2010 around New Year.

Using a lever machine

Tuesday, June 2nd, 2009
lever-texture

These last few days have been a pleasant, but steep learning curve.  I know I’ve muttered about pressure profiling from time to time, but I hadn’t really played with a lever machine properly until Gwilym’s WBC prize arrived. 1
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Footnotes:
  1. Yes, we kindly offered to ‘look after’ it for him for now… []

Rate my predictions for 2008

Tuesday, December 23rd, 2008

On January 2nd this year I made five predictions – you can read them here – and I guess before I put up my predictions for 2009 I should probably decide how well I did last year.  Or better still – you guys decide!

1 – The spread of the Clover.

I could be really brave and predict that Starbucks will start using
them, but I think the guys at Clover would curse me for jinxing them!

I think I did pretty well here – though no one predicted Starbucks buying them outright.  You could argue that Starbucks haven’t really spread them around, but as I am not in the States I don’t know how often they are cropping up.

2 – World Barista Championships

I am not going to be as bold/stupid as to try and pick a winner but I
think the shift away from a Scandinavian-heavy final will continue.

2 of the 6 finalists were Scandinavian, but neither placed in the top 3.  I feel pretty safe claiming this one!  Congrats again to Stephen!

3 – Coffee prices continue to rise

I am not sure I am going to be able to claim this one.  Whilst things did look good (briefly) for this prediction earlier in the year prices seemed to have slumped at the end of it.  (Don’t worry – I am not going to go on about the media exaggerated financial issues).

coffee-prices

4 – Pressure Profiling in Espresso

I am not sure on this one.  Synesso released the Hydra – the first machine with a pump per group as far as I know, LM released their new paddle group, John “The Awesome” Ermacoff kindly built me a pressure profiler that makes my head hurt but makes me happy, and the new Slayer machine also is big on pressure profiling.  All the above says yay, but I don’t feel we’ve come much further on understanding it all.

5 – The continued rise of the Microlot

Again I feel the need to plead my case here.  Certainly this was the year of the Ethiopian microlot – the numbered lots from Aricha and Beloya getting everyone very excited for good reason.  This was the year that Esmeralda divided their crop into micro microlots for the auction.  This was also a year that my understanding of microlots got a little more nuanced, and I felt less sure that they were all I had wanted them to be 12 months ago.  From this point on I leave it up to you dear reader – how well did I predict the year?

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{democracy:5}

(You can add your own half point answers if you feel the need)

Would love to hear your comments on this.  I think I’d like to claim 4 out of 5, but that is up for debate!  Look out for my next set of hilarious predictions come January 1st!