I use screw capped polyethylene 55-60mL. laboratory tubes (recycled).
Capacity around 20g. from memory (1 double shot) works for me.
Im starting to do a bit more home roasting and Im wondering if anyone has any tips on nice airtight jars to store coffee in. At the moment, I have a few mason jars floating around that seem to do the trick, but I thought it might be worthwhile asking as others might also be interested. Something totally opaque would be good. Im not looking for vacuum containers.
I use screw capped polyethylene 55-60mL. laboratory tubes (recycled).
Capacity around 20g. from memory (1 double shot) works for me.
I use a click clack container and a lock and lock container. Finding opaque ones is difficult. So I just use some paper to line the click clack cylindrical container.
Why not use bags? I started with airtight containers but it was hard to find opaque ones. My 300ml perpex jars ended up cracked from the degassing.
Bags arent reusable and they dont really seal properly unless you impulse seal them. Even then, plastic bags still have a level of oxygen permeability. Plastic bags also have some loose space and some give in them; you need a rigid and strong material if you want to store your coffee under pressure, which is something that Im interested to experiment with.Originally Posted by 455B595D534F5253555D360 link=1275152350/3#3 date=1275175541
Im surprised that your perspex jars broke - Ive heard people saying that even 250g in a valveless bag doesnt generate enough gas for it to rupture.
Cool idea.Originally Posted by 5A5F585245574F4457360 link=1275152350/1#1 date=1275163960
Im not a fan of plastic, though. It seems to absorb flavours, plus Im never sure about oxygen permeability. My little sister bought a "Keep Cup", for example, which now smells very strong; I ran it through the dishwasher a few times to no avail - I think that she has been making english breakfast tea in it.
The paper is a good solution, and part of my frustration that I havent been able to find mason jars in a plain cylindrical shape to facilitate this. Grrr.Originally Posted by 54574444535A360 link=1275152350/2#2 date=1275175392
Will keep looking ... seems like mason jars are probably the best option ... any other suggestions?
You could line the bags with a freezer bag as I do.
They can be impulse sealed quite a few times depending on how [s]anal[/s] fussy you are.
I spotted some steel enamel mason type jars at ikea. Product name: Sagolik steel enamel storage jar. Completely opaque.
I havent used jars before ;) I really dig the Merlo tins, theyre so tight theyre like paint tins, and Ive had two of them for years now and theyre still good! :D
I store my browns in Vacu Vin clear hard plastic vacuum containers that use the pump and seal as used to preserve wine in opened bottles.
I put my roasted beans in the vacuum containers soon after they reach room temperature.
I think it extends the life of the beans by reducing oxygen and moisture in the container. *
It should also help degassing the freshly roasted beans.
Good stuff Barry,
I reckon they accelerate outgassing and if anything, decrease the lifespan of the beans....
Horses for courses ;)
I also use VacuVin containers, but dont actually use it under vacuum. If you think about it its an air tight container with a one way valve.
You normally use the pump to suck the air out of the valve and it doesnt let air back in. The same action as a one way valve.
I use the delonghi coffee canister. Had it two weeks now so cannot comment whether it keeps beans fresher or not however i love the the gadget factor :D
....you people are not drinking your coffee fast enough...
I just use the coffee bags once, I figure the money I am saving by roasting my own I can afford to purchase the bags and still be better off.
I go the Thundergod route, small freezer bags inside the coffee pouch each time, impulse sealed until ready for use. There is enough space above the ziplock sealer for 2-3 impulse seals if you are careful, by then the pouch is past it anyway.
This link is for DIY
One Way Valve Jars Home Made
I like it ;)Originally Posted by 10343D3D3E3E0410342836345B0 link=1275152350/15#15 date=1278636527
I actually had the same idea some time agoOriginally Posted by 07282123340B27282721232B232832460 link=1275152350/16#16 date=1278638258
That is to use an air tight container and glue the one way valve from an old spent coffee bag on the lid
I was in a Woolworths Supermarket earlier today and found something that might just be similiar to the DIY kits. In the Coffee shelf near the Illy Caffe tins, (which may also be suitable for a DIY job), there was, and Im embarrased to say Ive forgotten the brand but it was imported, a tin similiar to the Illy Caffe in quality, but it appeared to have a valve in the top. Quite a small hole, and I did not notice it at first.
If you can get around buying coffee off the shelf, then ditching it for the tin, they may well be suitable. It will need testing because I do not know how well they seal after being opened. This is the same case for the Illy Caffe, nice tin, but believe they come with a rip off type metal seal top, so not sure if the screw top seals well enough afterwards, although it look like it could. I have an old Illy tin I might experiment with.
I got to thinking:
Why not make one way valves for a jar/tin/whathaveyou?
Back in the olden days push bikes had a very user unfriendly style of OWV (one-way valve or check valve) to keep air in the inner tube.
The OWV essentially was a thin metal tube with a hole in the wall and one end sealed a snug fitting rubber sleeve tube pushed down over the thin metal tube and itís hole in the wall. To inflate the tube air was forced into the open tube end and at a certain pressure differential air escaped out of the hole in the wall passed the rubber sleeve and into the inner tube but could not flow in the opposite direction. If this system was applied to coffee storage a thin walled and easily stretched rubber/plastic tube should be selected.
Another type of OWV may incorporate a ball and seat, this style of valves may be found in pump spray bottles etc. where a spring may be used to hold the ball against its seat. After a bit of a scratch *around my workplace I located some tapered plastic tubes, a small O-ring, a ~4mm steel ball bearing and a ~12mm plastic ball. With these I as able to make a range of OWVs, utilising the weight of the ball to make the seal against the tapered seat. The prototypes seem to be effective OWVs. While not awesome in their own right I imagine acquiring an Egyptian Canopic jar or a Ming vase and incorporating one of these into a suitable lid should qualify as awesome coffee storage.
Using new components the cheapest would set you back about $25 / 500 (Canopic jar or Ming vase not included).
Photo 1. 15mL. and 1.5mL. centrifuge tubes with 12mm and 4mm balls, tube ODs 21mm and 10mm ( 0.6 and 0.2mL. tubes are also available).
Note the base and the lid of these tubes would need to be perforated with a hot probe or similar to allow the upward passage of gas but the ball would prevent the downwards passage.
Photo 2. 90mm long pipette filter tip with 4mm ball sitting on O-ring on filter, tube OD up to 7mm,
Note: I flamed the top of tube to prevent balls escape, hence jagged appearance (this is a tapered tube open at each end with a 6mm filter).
photo 3 *75mm long pipette tips 2 with 4mm ball in lower tip, tube OD up to 8mm,
Note: Second (top) tip fitted to prevent balls escape (these are tapered tubes open at each end).
The 75mm long pipette tips 2 with 4mm ball in lower tip.
Note: These have been pressed into a 7.5mm hole drilled in a water bottle lid for testing.
Why not just drill a hole in the jar lid and glue a OWV, cut from an old coffee bag, into place?Originally Posted by 4346414B5C4E565D4E2F0 link=1275152350/19#19 date=1278940138
Not my idea; its already been done; google should be able to locate it for you if interested.
After the first 12 to 24 hours thee is no need for a one-way valve at all. Those valves are used on bags to keep the bags from bursting during storage or shipping. Use the mason jars, and leave the lid slightly loose for the first day. After that just keep the lid tight and store them in a cool, dark place, and dont worry about it. You are best served t use the beans within no more than three weeks after roasting, and even that is pushing it. For espresso I try to only use beans no more than about a week to ten days old. There are a few exceptions, but generally that works for me.
STORY: I shipped my brother three or four batches of roasted coffee in vac sealed bags, placed in a corrugated box, and it was a pretty tight fit. didnt poke holes on the bags, and my brother said when he got the box just two or three days after it was shipped it was a sphere on the verge of bursting because the bags were completely inflated from the outgassing of the beans. That s why one-way valves are used.
Dont complain about the irrelevance of OWVs or my compulsive nature.
The man wants "AWESOME COFFEE JARS!"
Give the man AWESOME COFFEE JARS! at least until Andy lists Ming or Canopic coffee bags.
I dont plan to use one way anythings, Im hooked on 17g. individual screw capped containers from roast to the grinder.
Does anyone know if the price of OWV bags (to dissect the OWV from) does better $25 per 500 valves?
Originally Posted by 1D213C272D2C3B2E262D490 link=1275152350/20#20 date=1278942550
I posted this info and link
Back ^^^ up on post 15
Sorry KK; I didnt follow the link. :-[Originally Posted by 7B5F565655556F7B5F435D5F300 link=1275152350/23#23 date=1278976293
Did anyone copyright the OWV bag transplant idea?
I dont understand why people want to put valves in jars. Is there actually a reason behind it based on taste, or are people just presuming that valves should be there because much coffee packaging does have valves? Isnt it possible that the reason for one way valves in commercial packaging is really more to do with keeping bags from bursting than taste?
How much do you have to store in a glass jar before it is even necessary to do that? Surely a 650mL mason jar capable of taking more or less 250g of coffee, full to the top, wont rupture from the pressure?Originally Posted by 00333C362B0D157C520 link=1275152350/21#21 date=1278946598
I think this misses the point that storage can be used for flavour development.Originally Posted by 3D2821313D2626520 link=1275152350/12#12 date=1278631363
I think ozscotts comment was tongue in cheek. ;)Originally Posted by 342D3B39580 link=1275152350/26#26 date=1279021669
You looking for awesome, nice or boringly functional?
I still think the Ikea jars are the way to go.
Mason jars dont seal all that well ::) http://www.icmag.com/ic/showthread.php?t=178179
Bacl On topic try something like these http://www.inglass.com/amber_jars.htm Teflon lined lids
I love those old style brown medicine jars. Stumptown are selling Esmeralda especial in them this year... when you want to protect something, tight brown medicine jars seem the obvious choice.
i used to use old moccona jars i inherited from the MiL, i had to stop the tops popping with ribbon ties (two per jar) that i kept for the purpose; in the end it was washing and drying the jars that put an end to it. i tried lining the jars with freezer bags but the jars still needed cleaning just as often, (due to build up of odour). all in all, a nice way to store, glass is fantastic, just too time consuming.
i like the old wide mouth cookie type jars, theyd be easier to clean too.
I had read about the out- gassing of CO2 and thought about making a simple one way valve on some standard large jam jars.
I did make a prototype by drilling a hole in the top of the jam jar and sticking the plug out of a Stadler(?) pen into the hole with silicon sealant , the pen top had a hole drilled in the side and I then slid e piece of silicon tubing over the pen plug (see picture). Pressure inside the jar expands the silicon tubing and allows the gas to escape.
I tested the valve by putting some metho in the jar, putting the valved lid on and then putting the whole thing in the sink in hot water, the valve was out of the water and covered in weak detergent so that bubbles would appear if the alcohol vapour gets out. The alcohol vapour does get out of the jar just fine. I then put the jar into cold water, and the lid sucked down and went click. The valve works as a one way valve.
I did the same test with an unmodified jar, and the alcohol vapour gets out of the jar if the lid is only just screwed on. When this jar is put into the cold water the lid clicks down as before. If you donít screw the lid on too tight the lid works as a one way valve.
I told my wife what I had discovered, and she said this is how the jars are designed, and gave me one of those looks. The jars are supposed to be filled with hot (almost boiling) food, and when they cool the lid sucks down. If you open a jar and the lid does not click the food has been generating gas, so donít eat it.
Iím going to be using ordinary jam jars. Or I may make a trip to Plasden Glass Pak who sell all types of jars up to 4.25litres.
Sorry, heres Plasdenes web address [ftp]http://www.plasdene.com.au/[/ftp] and the picture of the one way valve on the first jar.
I use these.
Called tupperware stuffables. The ones I have will hold 200g comfortably. The lids are silicon and you just push down on them when you are putting the lid on them and the spring in the silicon lid creates a slight vaccum.
This may not be the solution to everyones storage needs but hopefully it may be someones answer to something (coffee beans, lentils, air movement, insects).
This idea was presented to me as a general storage idea by my cousin in Newcastle (she probably originally got the idea online from China).
I hope someone finds this idea useful and if it has been posted before my apologies.
Very clever. Thanks for sharing Lindsay. I wonder what would make the ideal bag to use. It would need to strong but thin and supple.Originally Posted by 4247404A5D4F575C4F2E0 link=1275152350/36#36 date=1286021812
Some really cool ideas in this thread!
I have been trying out an ikea jar called the droppar... it has a slide on lid which is plastic/metal but the jar itself is glass with some of the side frosted.
I keep my bean batches in paper bags and put it in the jar, no smell has leaked out so far so I guess the seal is ok. I liked the slide on lid as it seems to me that itd prevent any kind of breakage due to degassing... just put a fresh roast in so lets see how it goes!