dario Senior Member Joined: 6 Jun 2006 Posts: 60 Location: mn Expertise: I love coffee
Posted Sun Dec 6, 2009, 1:47pm Subject: grind consistency
For an expirement i ground 16.5 grams of coffee in my Capresso Infinity grinder. I then dumped it all in a fine strainer. I reweighed it and had lost 3gr. So what does that say about my grinder?
Hi Jerry... Eyes, and fingers...I spread out a little on a white sheet of paper and look at the size of the grains with a powerful magnifying glass, and then I grab a pinch between my fingers and see how consistent it feels.
Perhaps the most accurate (and geeky :-) method is to perform particle sizing with a laser diffractometer. All the espresso grinders that I tested showed a bimodal distribution of particle sizes, confirming what Petracco and others have found. There is a large peak of coffee particles centered around 400 microns in diameter, and a smaller peak of particles centered around 40 microns in diameter. The smaller diameter particles are referred to as fines.
Fines comprise only a small portion of the overall grind volume, but are thought to be critically important in regulating espresso flow. They can impact non-espresso brewing as well, but in a negative way, by clogging paper filters and creating muddiness in press pot coffee.
bodum_fanatic Senior Member Joined: 19 Dec 2006 Posts: 397 Location: Missouri Expertise: I live coffee
Espresso: Won't become one of those... Grinder: Braun KMM30, Krups Fast... Vac Pot: Never had much luck there. Drip: Melitta Deluxe 132 made in... Roaster: West Bend Poppery II
Posted Mon Dec 7, 2009, 10:21am Subject: Re: grind consistency
I used to conduct such experiments, trying to deterimine whether or not my grinder was doing a perfect job, and comparing the consistency of grind between different grinders. Now I take medication, and I'm no longer inclined to do so. : P
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
= No New Posts since last visit 