Coffee Technology
Latest articles, industry insights and brewing guides
Some Suggestions on First Baking and Second Baking
First of all, because of the confusion of the names of "baking degree," I quote SCAA numbers to explain the baking temperature. (See Kenneth Davids 'Home Coffee Roasting at pp. 57 - 58 and the baked color blocks on the back cover)
Coffee Bean Processing
Natural drying method Coffee refining process Coffee cherries (coffee cherries) Selection and treatment of green beans Harvesting sun field (sun exposure) Shelling machine (removal of pulp, etc.) Electronic bean sorter or wind bean sorter (hand)
How to choose and buy coffee beans
No matter what kind of coffee beans, freshness is an important factor affecting the quality. When shopping, grab one or two coffee beans and chew them in your mouth. If the coffee beans are crisp and sound, and the tooth pods stay fragrant is the top grade, but it is best to squeeze them with your hands to feel whether they are solid, rather than buying empty-shell coffee.
Natural Environmental conditions for growing Coffee: an introduction
The ideal environmental conditions for planting Arabica coffee trees are as follows:
The knack of distinguishing the freshness of coffee beans
Nose smell: fresh coffee beans smell strong fragrance, otherwise tasteless or bad smell. Look at it: good coffee beans are complete in shape and full in size. On the contrary, the shape is incomplete. Hand pressure: fresh coffee beans are fresh and crisp, and the fragrance comes out when they crack. Color: dark black coffee beans, the coffee brewed has a bitter taste; yellow coffee beans, the coffee brewed has a sour taste.
What kind of raw beans are good raw beans?
A coffee seller (usually refers to a coffee bar or a centralized processing of raw beans) must decide the classification of coffee beans before it reaches the buyer (usually an importer, broker, or bean dealer). After the classification is completed, there will still be some coffee beans in the "Exceptional" and "Specialty" grades that will not be included in the classification.
How to buy raw beans? What kind of raw beans are good raw beans?
Sellers of raw beans (usually coffee farmers or processing plants that deal with raw beans) must be responsible for the grading of coffee beans before they are sold to buyers (usually importers, brokers, or bean merchants). Once the classification is completed, there will still be some coffee beans of "Exceptional" and "Specialty" that will not be included in the classification.
Why bake at home and use single-product beans
First of all, premium-grade coffee beans are usually sold in two forms:
How to control the baking depth
No matter which baking method you use at present, as long as you use it exclusively and continuously, you will be more comfortable with the timing over a long period of time. Once again, the baking tips provided here are more difficult to understand than fried eggs and roast beef. The only reason is that you are not familiar with it!
How to identify good coffee beans?
No matter what kind of coffee beans, freshness is an important factor affecting the quality. When shopping, grab one or two coffee beans and chew them in your mouth. If the coffee beans are crisp and sound, and the tooth pods stay fragrant is the top grade, but it is best to squeeze them with your hands to feel whether they are solid, rather than buying empty-shell coffee.
![[illustration] the kinds of coffee roasted](https://world.gafei.com/uploads/allimg/140704/112H44514-0-lp.jpg)
[illustration] the kinds of coffee roasted
According to the color standard and caramel degree, coffee can be divided into the following roasting methods
About the roasting of coffee
Roasting: this heat treatment causes significant chemical and physical changes in the structure and composition of raw coffee, causing the beans to darken and emit the characteristic aroma of roasted coffee.
Collection and production of Coffee Fruit
Coffee berries usually contain two raw coffee beans, sometimes three coffee beans and sometimes only one coffee bean.
It's best to teach you how to drink coffee.
How to taste coffee: tasting coffee is not only a kind of enjoyment, but also a discipline. Drinking while it is hot is a necessary condition for tasting coffee. The appropriate temperature for brewing coffee is 83 degrees, and pouring into the cup is 80 degrees, while the temperature for mouth is 61-62 degrees. It is best to drink after 10 minutes. You should also pay attention to the weight of a cup of coffee. Seventy-eight is the best. If you want to drink three or four drinks in a row, then
Making skills and points for attention of Japanese hand-made Coffee
Japanese-style hand-brewed coffee seems simple, but in fact, a little carelessness in each step will lead to different tastes of coffee or subtle changes. there are a few points that need to master the basic principles of making Japanese-style hand-brewed coffee and some variables when making Japanese-style hand-made coffee.
Sieve powder-just for a clear cup of coffee
For friends who often drink coffee at home, it is estimated that they will be no stranger to all kinds of bean grinders. At present, there are Mazzer, Little Eagle, Pegasus, solis 166, rancilio rocky, Yang Family 900n, Big Flying Eagle and so on. Each mill has its own advantages, some are cost-effective, some are functional. But no matter which one, it doesn't seem to be able to solve the problem at this stage.
Extraction amount and concentration of coffee flavor
Recently, I chatted with some friends and found that many friends have such a basic concept. The finer the coffee is ground, the stronger the taste will be, while the thicker the coffee will be, the lighter it will be.
Sweet Sunshine-- according to Brazil
Brazil is the largest coffee producer in the world, especially commercial coffee. Brazil's annual output will jointly affect the price trend and trend of the whole coffee market. In a sense, Brazil can be said to be the leading country of coffee.
Production of espresso (production of espresso)
Recently, through communication with many friends who like coffee, I found that many friends have problems in making espresso, even though many friends have bought relatively professional machines and equipment, but still can not make a relatively satisfactory cup of espresso.
E61 coffee machine head water distribution network cleaning
Recently, I have found that more and more friends use quasi-professional Italian machines to make coffee, including Oscar, Silvier, and E61 small machines for head cooking, but when I ask them how to clean and maintain them, many people are surprised. Some friends do backflushing regularly, but they don't clean the water distribution network.