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Transparent portafilter
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Senior Member
Joined: 26 Mar 2014
Posts: 2
Location: ZA
Expertise: I love coffee

Espresso: Simonelli Oscar
Grinder: Capresso Infinity
Posted Fri Apr 4, 2014, 12:52am
Subject: Transparent portafilter

Just saw this video, and thought it might be of interest to the general community, someone created a perspex portafilter in order to see what is actually happening during the extraction.


I suggest following the link to his page, as there are some extra video's and an explanation of the project.

Interesting to see what happens to the puck when the extraction is over.
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Joined: 25 Nov 2007
Posts: 8,215
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Apr 4, 2014, 6:29am
Subject: Re: Transparent portafilter

UH, OK, thanks for the link.

It really was not any different than what I had envisioned happens inside the coffee basket and in his case, modified to a portafilter (the coffee basket that holds the coffee sits INSIDE the portafilter) OH as a warning to people, the volume is really LOUD so you may want to turn the volume down before you hit the play arrow.

You can't SEE pressure inside the machine.  It does not improve the shot in any way, I suppose like a bottomless PF, you may see some way to improve your shot prep but also like a bottomless PF, once you get your prep and grind correct, it is pretty much only eye candy, not adding anything to the shot.

Fun to see though I guess ;D

OH, BTW, as soon as you can, you will want to upgrade your grinder. The Capresso is really holding back your Oscar.

In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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Senior Member
Joined: 5 Oct 2007
Posts: 84
Location: Greenville, NC
Expertise: I live coffee

Posted Fri Apr 4, 2014, 6:38am
Subject: Re: Transparent portafilter

Is that the same transparent pf video and concept that has been floating around for a while or a new envisioning? I remember seeing something about this a long while back on HB.
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Joined: 20 Mar 2013
Posts: 394
Location: Los Angeles
Expertise: I love coffee

Espresso: Bezzera Strega, '84 La...
Grinder: Compak K10, Kludge grinder,...
Posted Fri Apr 4, 2014, 3:21pm
Subject: Re: Transparent portafilter

There's a newer thread about this on HB
Click Here (www.home-barista.com)

The beginning of that video you can see the whole puck lift when the lever piston is lifted.  (This is on a lever machine.)  So lever machines might benefit from lifting the lever and then locking the portafilter to ensure a good seal around the outside.  There are supposed to be more videos in the future too.
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