Surely, baristas have heard a lot about green coffee, and many centers will have specific themes to teach about green coffee in their courses. However, to provide a better understanding of the notion of this coffee variation to baristas. Helena will walk you through what it is and the challenges that surround it in the article below.
1 – What are green coffee beans?
Fresh coffee is another name for it. Green coffee beans, in essence, are coffee beans that have not been roasted, have a natural green color, are taken directly from the tree, and have not been processed in any way.
2 – How to classify green coffee beans?
Green coffee beans are categorized in various ways based on bean size, kind, and processing method.
2.1 – Classification of green coffee beans based on the type
Green coffee comprises two common coffee varieties: Arabica and Robusta. Green Arabica coffee, often known as tea coffee, is grown at altitudes of 1000 meters or above. Arabica coffee is prized for its aromatic flavor, unique aftertaste, and elegant flavor. Caturra, Bourbon, Mocha, Typica, and Catimor are five prominent Arabica cultivars. Robusta coffee, unlike Arabica, enjoys the sun, is suited to hot and humid tropical climes, is cultivated in low mountain locations, is disease resistant, and has a high caffeine concentration.
2.2 – Classification of green coffee beans by processing method
Dry processing, wet processing, and honey processing are the three most popular coffee processing methods now in use (D’codeS has separate analysis articles on these three processing methods).
2.3 – Classification of green coffee beans by size
Green coffee beans that are still it beans and coffee husks will be obtained after being ground dry. Bucket coffee refers to a group of coffee beans that have not been sorted and hence have a variety of kernels and sizes. It beans are divided into different sizes depending on the customer’s requirements. Sieve 16, 18, 19, and 20 are examples of high-quality it varietals. However, sieve 16 and sieve 18 beans are the most famous beans used to make roasted coffee beans. To save money on sieves, smaller sieves with sizes 14, 15, and lesser quality will be used as mixing materials. Instant coffee is frequently made using coffee with a sieve size of 13.
3 – The process of processing green coffee beans
3.1 – Harvesting fresh coffee berries
Farmers will harvest fresh coffee berries when they turn crimson. It is still harvested in Vietnam using the manual method of plucking ripe coffee cherries by hand.
3.2 – Preliminary processing of fresh coffee
If wet and honey processing is utilized, fresh coffee cherries will be removed from the shell as soon as they are collected. The coffee cherries will be naturally sun-dried to reduce the amount of water before being peeled if the dry processing method is used. The coffee beans are fermented or dried, depending on the manufacturing procedure.
3.3 – Reduce moisture in coffee beans
Sun-drying or drying will reduce moisture in coffee beans before packaging to 12.5 percent.
3.4 – Screening and grading of coffee
The green coffee beans will be inspected for external contaminants and categorized according to grain size after being dried and reduced in moisture. The beans are then dyed or polished according to the buyer’s requirements.
4 – How to preserve green coffee beans?
It keeps coffee fresh in a bag: (can use sacks, jute bags …). Today, this is one of the most often employed strategies. However, there are a few points to consider when using this method.
- It must have a moisture level of less than 13% before being placed in the storage bag.
- Impurities in coffee should be kept to a minimum; for grade I and II coffees, the impurity percentage must be less than 0.5 percent.
- Store in climate-controlled warehouses with enough insulation and humidity.
- Before storing the coffee bags in the warehouse, they must be disinfected and cleaned.
- Coffee bags should be put 0.3m away from the ground and 0.5m away from the wall, not immediately on the earth and next to the wall.
- Every three weeks, the packing order must be reversed to avoid bag compression due to the weight of the higher bags.
5 – The value of green coffee beans
Coffee has an extremely high transaction price on the global commodities market, and its trading volume is second only to oil. The more expensive it is, the higher it’s quality. Arabica is more costly and respected than Robusta coffee.
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