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Portafilter lost its shine in the dishwasher
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Discussions > Espresso > Q and A > Portafilter lost...  
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
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Location: Riverside, Ca, U.S.A.
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Espresso: ECM Vene. A1, La Cimbali M32
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Vac Pot: 40s era Silex
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Posted Tue Jan 1, 2013, 8:13pm
Subject: Re: Portafilter lost its shine in the dishwasher
 

what happened is very simple you have an aluminum porta  filter and it was polished. the harsh chemicals in the dishwasher disolved all the gloss on the Polish and expose the raw aluminum which is oxidized. once you remove the oxidized metal (which will drop off your fingers) then it will be safe to use.

EDIT:
Just adding that we have a Kitchen Aid stand mixer that has an aluminum beater, it wound up in the dishwasher by accident and the exact same thing happened, it went from a nice shiny polished beater to a dull grey one that had aluminum oxide rubbing off onto your fingers. A scrub with Scotchbright took off the oxidation but left a dull but clean surface that is perfectly useable.  YMMV!

 
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durgaprasadzone
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Joined: 3 Jan 2013
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Location: palam
Expertise: Just starting

Posted Thu Jan 3, 2013, 10:24pm
Subject: Re: Portafilter lost its shine in the dishwasher
 

Thanks for information for sharring.

 
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fwtechwiz
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Joined: 19 Feb 2010
Posts: 530
Location: Fort Wayne, IN
Expertise: I live coffee

Espresso: Gaggia Evolution
Grinder: Hario Skerton
Posted Sun Jan 6, 2013, 4:41pm
Subject: Re: Portafilter lost its shine in the dishwasher
 

Dylan_Hunt Said:

Thanks for the reply fwtechwiz. Did your portafilter look like it was plated with some shiny substance like chrome? When the plated substance came off, did it look like a dull grey? Did some metal residue rub off onto your hands or rag when this first happened? How long did you continue to use your portafilter after it lost its shine?

Posted January 1, 2013 link

The shine on the p/f is not plating, it is simply highly polished aluminum.  Yes, the p/f came out dull grey, and did leave a black residue on my hands and the polishing rag.  The shine never came back, but once all the black gunk was off, I continued to use it for about 6 months, until I upgraded to my Evolution.  
Pic is attached, taken after I drilled off the bottom and converted it to naked.
BTW it was one of my best shots from the cheapo Hamilton Beach.
Proof that a cheap machine and a good grinder can make great espresso!!

fwtechwiz: snap~shot.jpg
(Click for larger image)
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