Transparent portafilter shots

Some first tests with Sweeney's Transparent Portafilter. Must try some more to 1) prevent seal popping 2) get a nicer extraction, like one normally and easily gets with the L1 and the standard portafilter setup.

[@c0r5e]

A puck screen can literally save the puck jumps

[@palefire]

;-) I believe you, a puck screen can help but what does 'literally' mean here? ;-)

[@TheLittleBluesBoy]

nice idea man ;) interesting to see ;)

[@palefire]

Thanks! The next TPF is ready, hope to film a clip soon!

[@mescellaneous]

there goes the wdt

[@jonathantang86]

I want to know what kind of meachine that you use.And also how the "puck jump'' produce?

[@palefire]

Here we used one of the first Londinium machines with the same brew group as is now still used on the Londinium-R: londiniumespresso.com/buy-now/product/191-londinium-r Raising the lever, one creates a low pressure above the puck. If the puck is compacted too tight, it may be lifted for a moment.

[@hakanzehler1997]

gaaah, the constant hunt for the "perfect coffee" :D Very interesting to see, though.

[@palefire]

Thanks Håkan!

[@ondrejmacicek4886]

material must be non toxic without BPA (this can be harmful E.g. for pregnant women)

[@palefire]

Certainly we never tasted any of these extractions. This was for visual inspection / observation.

[@andrewbader6636]

Can you build me one for $$ have a barista express

[@palefire]

Hi Andrew -- it's probably best to find someone nearby you to develop one. A device like this suffers much in use with sealed fittings of very different materials under fast changes of temperatures from room temp to boiling heat and pressure increase and pressure drops between atmospheric and 9 bar, so it's wise anyway to have a technician nearby to monitor and fix the device for the (limited) life span that it has.

[@achitofernandez2570]

Hi, its posible buy this?