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The most scientific guide for the purchase and preservation of coffee beans, see here! Guidelines for the preservation of coffee beans
How to lock a good coffee flavor--
Normal preservation condition
Raw beans: can be stored for one year
Roasted coffee beans: the best taste period is 3Mur14 days, and it's OK for a month-- think about it for more than three months.
Ground coffee powder: not boiled for 15 minutes-flavor begins to go out of shape-
So make your own coffee-at least buy fresh baked beans-and don't ask the store to grind first-buy a bean grinder first! The problem with the bean grinder-- next time--
The recent hot weather-- coffee beans-- sometimes left in the car for 3 hours-- almost out of shape for 10 days--
Because after the coffee is roasted-- the chemical reaction of the coffee does not stop-- there is CO2 emission-- especially if the coffee beans are filled with oxygen (O2) environment-- the elements that contribute to the coffee reaction--
1. Coffee beans purchased by ordinary stores Will be packaged with a so-called one-way exhaust valve-the gas in the package can be discharged through this valve, so that the coffee beans can be stored in a more "anoxic" environment (due to the exhaust CO2 squeezing out O2) So the coffee response slows down-- we experiment-- but this exhaust valve slows down the coffee flavor dissipation by 30% (in my opinion-exhaust valve advocates don't hit me)-- in fact, the main function-- coffee beans are packaged immediately after roasting-- exhaust (CO2) about twice the volume of coffee in a week. If it is not discharged at the right time-- when the coffee may "explode" (that is, the package burst)--
two。 In fact, illy, a big coffee maker, has a kind of aluminum canned coffee beans-we may have bought it for more than a month! But why do consumers always feel fresh when they open it and start cooking-it is known! It's packed in aluminum cans-- and filled with N2-- to keep the coffee beans in an oxygen-free environment-- so even if you buy them for more than 30 days of roasting-- it always feels like the freshest coffee beans in 3Murray for seven days.
3. Can raw coffee beans be vacuum packed into bean bricks?-- such as the high-quality vacuum rice bricks bought in stores-- which are indeed sold by many big coffee factories in Germany-- generally do not! We don't have a really vacuum machine and packaging-- it's known-- if the air is pumped in a negative pressure environment (there's still O2)-- which speeds up the chemical reaction and flavor dissipation of coffee--
So usually I roast coffee beans-- I wrap them in a chain bag-- squeeze out and seal the air inside-- it's not the best way-- usually I start cooking the beans within a week-- and then I change her into sealed cans.
And this amount is usually controlled in the 200g--0.5lb room, using chain bags and 850ml buckle sealed cans--
Above, put the coffee beans you want to drink for a week in a sealed can-- and finish the beans in two weeks-- really haven't had "stale coffee" for a long time.
But what I just said-- beans are sometimes carried in the car for four hours-- especially in the recent hot weather-- it seems that the flavor of beans has changed a lot.
Read some articles--
Beans should be frozen--
Freezing method--
Be sure to use a sealed chain bag-- squeeze out the air at the same time-- preferably a double seal-- then put it in the freezer-- if possible, a layer of bread and a layer of newspaper--
Once bought a piece of ice in Xinying, the shop owner wrapped it with several layers of newspapers-- back in the north, the ice is still hard-- you can also go to Xindian and there is a turtle (Gui) Mountain Power Plant in front of the Feicui Reservoir. The Zhizai ice sold by Taiwan Power Company is wrapped in newspapers.
In the past two weeks, I went south and wrapped it in the car for four or five hours-- Hey, hey! Beans are like popsicles--
Especially when we take things out of the freezer-- moisture condenses in the air at room temperature-- there are water droplets sweating.
In fact, the above double seals and newspapers-- when warming up-- don't rush to open the bag-- when the beans return to room temperature (about 2Murray for 3 hours), even if there are drops of water outside to dry first-- or the newspaper has been sucked away-- open the beans-- never condense moisture in the air--
That's my opinion-- in fact, this can sort out how to preserve coffee beans that we buy from stores-- to extend the duration of coffee taste.
It is recommended to buy it back and pack it in a week's consumption-- the suggestion to be used after a week can be frozen in a chain bag (outsourced newspaper)-- just measure the sealed jar and put it at room temperature within a week-- and frozen coffee beans. Remember to give 2Mui 3 hours of rewarming time to open the sealed bag-- this is a way to prolong the taste of coffee.
Give it a try!
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