chrisweaver87 Senior Member Joined: 11 Sep 2008 Posts: 5 Location: London, UK Expertise: Pro Barista
Posted Mon Mar 19, 2012, 2:16pm Subject: Re: Grinder Adjustments 101 by Chris Weaver
"This can be caused by the shot running too fast with a reasonable shot volume" So if you would say that 28ml is a reasonable shot volume, when I say too fast I'd mean an overall pour time of say, 20 seconds. As such, the water has passed through too fast to properly extract the coffee.
"high yield in a normal shot time" So this would be say a 35ml yield in 28 seconds. This means the water is in contact with the grinds for longer and the shot would be over-extracted due to passing too much water through the coffee.
Hope this clarify things, the semantics of espresso extraction are far too easy to get mixed up over (hence the initial revisions).
Posted Sat Mar 24, 2012, 4:48pm Subject: Re: Grinder Adjustments 101 by Chris Weaver
I just can't seem to stop this and I'm deeply sorry for that but the last seconds of extraction are pretty much irrelevant to the (extraction) yield. There's a point when coffee's given all that it's easily going to give and no matter how much water you push trough it, the extraction yield is going to stay roughly the same. If a shot runs fast, it's probably under-extracted. If obviously under-extracted shot that's flowing too fast is left to run for hours, it still won't turn into an over-extracted shot. Won't post in this thread anymore. I promise :)
21grams Senior Member Joined: 15 Apr 2012 Posts: 16 Location: Sydney OZ Expertise: I love coffee
Espresso: Wish List SLAYER, SYNESSO,... Grinder: Mazzer Robur-E, Mazzer... Drip: HARIO- Cold Drip, CHEMEX Roaster: FLUID BED
Posted Wed Apr 18, 2012, 1:06am Subject: Re: Grinder Adjustments 101 by Chris Weaver
Hi there! There are other factor's that follow, which is going to affect your extraction.
1)...After dialing the weight with your scale. (eg...14grams with timed grinder) & set the finesse of the grind. . The next dose will be out by 1 or 2grams.
2)...It depends on the coffee blend ( 2 bean blend right through to a 5 bean blend). Unless it's a single origin coffee. The grind dosage will vary, in so many different way's Because of the nature of the difference of density of each origin, ( eg...Brazil is not as dense as say Kenyan or a Peruvian, Bolivian, and so with so many other Hybrids )
3)...Let us say the blend is 50/50 ratio with a 2 bean blend....it will not be a 50/50 ratio in your ground dose. It will [ 9 out 10 ] be a 60/40, 70/30 evan as high as 80/20 or visa/versa, end result in the dosage. Therefore with a 3 or 5 bean blend, the ratio. ( eg.. 40/30/30 or 40/30/20/10 ratio ) the dose that you think and expect, it will be totally different. The difference will be the grams in the basket, in extraction time and finally, depends how intune your palate, you are going to notice the subtle difference in flavor.
4)...Overall in a fast pace espresso bar, with experience you should be able to identify the idiosyncrasies and adjust accordingly. ( either by sight, odour and taste )
21grams Senior Member Joined: 15 Apr 2012 Posts: 16 Location: Sydney OZ Expertise: I love coffee
Espresso: Wish List SLAYER, SYNESSO,... Grinder: Mazzer Robur-E, Mazzer... Drip: HARIO- Cold Drip, CHEMEX Roaster: FLUID BED
Posted Wed Apr 18, 2012, 2:10am Subject: Re: Grinder Adjustments 101 by Chris Weaver
21grams Said:
Hi there! There are other factor's that follow, which is going to affect your extraction.
1)...After dialing the weight with your scale. (eg...14grams with timed grinder) & set the finesse of the grind. . The next dose will be out by 1 or 2grams.
2)...It depends on the coffee blend ( 2 bean blend right through to a 5 bean blend). Unless it's a single origin coffee. The grind dosage will vary, in so many different way's Because of the nature of the difference of density of each origin, ( eg...Brazil is not as dense as say Kenyan or a Peruvian, Bolivian, and so with so many other Hybrids )
3)...Let us say the blend is 50/50 ratio with a 2 bean blend....it will not be a 50/50 ratio in your ground dose. It will [ 9 out 10 ] be a 60/40, 70/30 evan as high as 80/20 or visa/versa, end result in the dosage. Therefore with a 3 or 5 bean blend, the ratio. ( eg.. 40/30/30 or 40/30/20/10 ratio ) the dose that you think and expect, it will be totally different. The difference will be the grams in the basket, in extraction time and finally, depends how intune your palate, you are going to notice the subtle difference in flavor.
4)...Overall in a fast pace espresso bar, with experience you should be able to identify the idiosyncrasies and adjust accordingly. ( either by sight, odour and taste )
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 