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Drip filter improvement
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| edward |
Posted on 05/07/2010 14:00
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1/3 Pounder
Posts: 88
Joined: 18.08.08
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This is a two part post so look at the next post to see the second picture.
Like most of you I am always looking at ways to improve my cup quality.I am totally a drip person and have been thinking about how to get better extraction of the grounds. It seems to me that the grounds around the drain hole in the filter cup gets more extraction than the grounds farther away from the hole. The reason I think this is the filter cup is made to drain to the middle to the drain hole. It has ribs that are flat to keep the filter flat. The problem with this is the filter once wet lays in between these ribs against the bottom of the cup. The water can't fall through straight down and drain to the drain hole. It has to drain to the center of the filter to get out. The grounds at the center are over extracted and add a little bitterness to the cup. That is just my opinion. The cone filter to me would be the least desirable type filter because of this. I have found a way to keep the flat paper filter truly flat during brewing. I have a computer fan cover that is modified to fit in the filter cup.
edward attached the following image:
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| edward |
Posted on 05/07/2010 14:01
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1/3 Pounder
Posts: 88
Joined: 18.08.08
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I just bend the four wire eyes that hold the screws to make it fit flat and snug on the ribs of the filter cup. I put the filter on top of this and make my coffee as usual. Since the filter is really flat the water can fall straight down over the whole surface of the bottom of the filter. I have been testing this for more than a month and I can honestly say it makes a better tasting cup.
edward attached the following image:
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| seedlings |
Posted on 05/07/2010 14:40
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Super Admin
Posts: 3047
Joined: 27.06.07
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BRILLIANT! Now I need a giant gold permanent filter!
When I use my cone pourover, I stir the slurry.
CHAD
"You know, I think that horse is getting deader." |
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| Clifford |
Posted on 05/07/2010 15:15
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1/2 Pounder
Posts: 265
Joined: 09.01.09
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I am going to have to try this set up. A permanent flat bottomed gold filter as an insert should also work
May the Force be with your cup |
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| seedlings |
Posted on 05/07/2010 15:39
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Super Admin
Posts: 3047
Joined: 27.06.07
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I use the commercial, larger Nesco drip, so it would require a bigger swissgold filter than I've seen for sale.
CHAD
"You know, I think that horse is getting deader." |
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| bvwelch |
Posted on 05/07/2010 21:34
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1 1/2 Pounder
Posts: 892
Joined: 27.12.07
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Very neat, but doesn't your computer get warm w/o the fan? :-) |
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| randytsuch |
Posted on 05/08/2010 00:01
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1/2 Pounder
Posts: 156
Joined: 20.06.09
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seedlings wrote:
I use the commercial, larger Nesco drip, so it would require a bigger swissgold filter than I've seen for sale.
CHAD
I just bought a few different grid screens from mcmaster. One is to make a metal filter for my Aeropress, and the others are to try filtering out fines out of the coffee I grind at work. Made out of stainless.
Randy |
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| bvwelch |
Posted on 05/08/2010 05:13
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1 1/2 Pounder
Posts: 892
Joined: 27.12.07
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Randy - sounds interesting. send the part numbers of the ones you find work the best. thanks! |
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| seedlings |
Posted on 05/08/2010 07:11
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Super Admin
Posts: 3047
Joined: 27.06.07
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YES, Randy, please keep us posted with your success. What would be really nice is to make a false bottom for my existing basket with SS screen. Then the grounds go right in the basket, dump, rinse, repeat!
CHAD
Edited by seedlings on 05/08/2010 07:12
"You know, I think that horse is getting deader." |
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| farmroast |
Posted on 05/08/2010 12:31
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1/2 Pounder
Posts: 152
Joined: 20.12.06
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After reading some tests by Tom at SM on using a swissgold in a CCdripper(he doesn't recommend it) I've done a few cupping trials. The solids that a gold filter let through definitely hurt the cup. Even letting them settle for a couple mins. I had hoped to avoid the expense of the paper filters not sure the trade-off is worth it. I'm going to try using my commercial coffee grinder with a courser grind and longer steep to see if I can get something better with the gold filter.
Edited by farmroast on 05/08/2010 12:33
Ed B.
DreamRoast 1kg roaster, Major, Olympia Cremina, Technivorm 741 http://coffee-roa...gspot.com/ |
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| seedlings |
Posted on 05/08/2010 12:46
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Super Admin
Posts: 3047
Joined: 27.06.07
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I know people who don't mind a dirty, gritty cup. I don't like the fines, and my Press gets little use.
CHAD
"You know, I think that horse is getting deader." |
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| edward |
Posted on 05/08/2010 14:12
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1/3 Pounder
Posts: 88
Joined: 18.08.08
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I have looked for stainless steel screen wire at Home Depot, Lowes and some independent hardware stores. I have not been able to find stainless steel screen. Anybody know of a source?
Bill, I am trying to build a cover for my computer fan. |
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| allenb |
Posted on 05/08/2010 14:56
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Administrator
Posts: 291
Joined: 23.02.10
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Check out this link at Small Parts Inc.
http://www.smallp...ion=submit
Very reputable company and good customer service.
Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana |
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| edward |
Posted on 05/11/2010 12:14
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1/3 Pounder
Posts: 88
Joined: 18.08.08
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Hey thanks for the link Allen. I have it bookmarked. |
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| randytsuch |
Posted on 05/24/2010 13:43
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1/2 Pounder
Posts: 156
Joined: 20.06.09
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I finally got around to trying a SS screen as a drip filter.
I bought one square foot of Pn 85385T878 from mcmaster, its 200 x 200 mesh stainless.
This weekend, I made a guide from paper, and then taped the paper pieces together, and used the guide to cut out the screen. I then made a filter for the Melita BCM-4 I use at work. I glued the filter together is food grade RTV, to form it for a size 2 basket.
Tried it this morning, and it worked fine. Coffee was different from a paper filter, seemed stronger, but I did not think it hurt the cup, just different, at least to me.
There was a little bit of sediment at the bottom of the cup, which of course is not there with paper.
I have no idea what the mesh size is for the gold, I just tried to compare it with a cheap plastic filter that came with my Black and Decker one cup coffee maker, and I'm pretty sure it is finer, need to check with magnification when I get a chance.
You can get finer then 200 mesh too, but the cost does go up with the finer grid stuff.
I also bought a couple of pieces of course stuff, to sift the coffee after grinding. Bought 24 x 24, and 20 x 20, but the 20 was too course, so I used the 24, pn 9238T531
I ended up building a little frame out of 3/4" al square tubing, and a flat piece of al, to wedge the screen to.
At work, I have an expresso grinder, using for drip, and I was getting to many fines, so the coffee didn't taste right. I started using the screen to sift the coffee, and it tastes much better. Someday, I may try a little finer screen, but the 24 seems pretty good.
I weighed the coffee, before and after sifting, and lost around 25% of the coffee.
EDIT:
I just had one of those lightbulb moments. I'm sifting out most of the really fine stuff, so there is not much left to get into the cup. If I really did a good job of sifting, there shouldn't be any sediment in the cup.
Randy
Edited by randytsuch on 05/24/2010 14:42 |
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