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Coffee Density: What is It and What Does It Affect?
Coffee taste depends on the density of its beans. But in reality it is an ambiguous parameter: high density doesn’t always guarantee high quality of coffee. In this article we want to tell you more about coffee density, what it affects and how to consider it during roasting process.
Previously, in Central America, farmers didn’t taste coffee beans; instead, they were sorted by height of trees. It was considered that the higher the coffee grows, the higher the density of its beans. People believed that beans with high density have more pronounced taste, that’s why farmers could sell them at a higher price.
Indeed, the coffee taste depends on the density of its beans. But in reality it is an ambiguous parameter: high density doesn’t always guarantee high quality of coffee.
In this article we want to tell you more about coffee density, what it affects and how to consider it during roasting process.
Indeed, the coffee taste depends on the density of its beans. But in reality it is an ambiguous parameter: high density doesn’t always guarantee high quality of coffee.
In this article we want to tell you more about coffee density, what it affects and how to consider it during roasting process.
What is coffee density
Coffee density, which is one of the key characteristics of coffee, is the ratio of mass per unit volume of a substance. In terms of coffee, it is measured on a scale from "strictly hard bean (SHB)" to "strictly soft bean (SSB)". But some countries may use other scales to measure it.
The coffee bean density depends on the following factors: ambient temperature, height of growth, and ripening time. The higher the coffee grows, the slower the metabolic processes occur. This is the reason why more organic matters accumulate in the coffee bean, and why it becomes denser. Due to higher temperatures, coffee grown at lower altitudes ripens faster and the texture of the beans becomes more porous.
The coffee bean density depends on the following factors: ambient temperature, height of growth, and ripening time. The higher the coffee grows, the slower the metabolic processes occur. This is the reason why more organic matters accumulate in the coffee bean, and why it becomes denser. Due to higher temperatures, coffee grown at lower altitudes ripens faster and the texture of the beans becomes more porous.
How to measure density and what does it affect
There are two main ways to measure coffee bean density. The first one is to estimate the central line of green coffee. The more the bean is open, the softer it is. And vice versa, closed coffee bean tells about its high density. But this method isn’t accurate.
The second option is more trustworthy. Beans are poured into a 1 liter container and weighed, the number of grams per liter is the density of coffee.
This indicator influences the taste of coffee. The bean with high density has higher taste potential as this coffee is more acidic and brighter. Due to low oxygen, low metabolism, and high temperature fluctuations, beans contain more organic matters.
Depending on coffee density, roasters determine at what temperature and how long the beans should be roasted.
The second option is more trustworthy. Beans are poured into a 1 liter container and weighed, the number of grams per liter is the density of coffee.
This indicator influences the taste of coffee. The bean with high density has higher taste potential as this coffee is more acidic and brighter. Due to low oxygen, low metabolism, and high temperature fluctuations, beans contain more organic matters.
Depending on coffee density, roasters determine at what temperature and how long the beans should be roasted.
Adapt the Roast to the Coffee Lot
Keep the density measurement with the lot
Density is mass per unit volume. When comparing green coffee, record the measurement method as well as the value, units and lot reference. A bulk measurement depends on how the sample occupies the measuring container.
A Royal Coffee lot analysis reports separate free-settled and instrument density measurements alongside moisture, water activity and screen-size information. Those are measurements of that coffee, rather than one density value standing in for every characteristic of a lot.
Build a roasting trial
Keep the coffee lot, batch size, machine, heat and airflow settings with the roast log. Compare the colour and cup result before deciding which adjustment to test next. Changing several settings together makes it harder to identify what affected the result.
A density reading does not specify a complete roast recipe. Use it alongside the other recorded coffee characteristics and observations from the trial, then keep the approved sample for comparison with later batches.
For finished-coffee purchasing
Keep the exact product, roast and sample reference with the offer. For shipment planning, use the declared net weight, pack and case quantity for that SKU. The case and pallet specification worksheet collects those commercial details.
Density is mass per unit volume. When comparing green coffee, record the measurement method as well as the value, units and lot reference. A bulk measurement depends on how the sample occupies the measuring container.
A Royal Coffee lot analysis reports separate free-settled and instrument density measurements alongside moisture, water activity and screen-size information. Those are measurements of that coffee, rather than one density value standing in for every characteristic of a lot.
Build a roasting trial
Keep the coffee lot, batch size, machine, heat and airflow settings with the roast log. Compare the colour and cup result before deciding which adjustment to test next. Changing several settings together makes it harder to identify what affected the result.
A density reading does not specify a complete roast recipe. Use it alongside the other recorded coffee characteristics and observations from the trial, then keep the approved sample for comparison with later batches.
For finished-coffee purchasing
Keep the exact product, roast and sample reference with the offer. For shipment planning, use the declared net weight, pack and case quantity for that SKU. The case and pallet specification worksheet collects those commercial details.