Coffee beans grown in different micro-climates are distinctive from one another and this is just one of the factors that affects their quality. Plant a great variety in the wrong soil or at the wrong altitude and the resulting product is inferior. Roasting is another factor that affects quality and modern specialty coffee roasters allow for more control over the roasting process. Despite the fact that these machines are usually user-friendly, it takes technical skill and experience to take the best varieties and reveal their full potential by roasting.
The crude machines of the past vary greatly from the computerized versions available today but the basic principles are still the same. The bean is taken from its green state and roasted to release the flavors. Drum machines are commonly used and these work by rotating and causing the beans to tumble around with gas or electricity providing the heat source. Hot air machines are also used and beans are roasted on a currant of hot air.
Drum roasters vary in capacity and level of control. Commercial ones are designed for high-volume roasting across the entire color-development spectrum. Others offer the same capabilities but come in smaller, tabletop designs. Continuous monitoring tools and user-friendly controls ensure precise, consistent results. Manual, automatic and semiautomatic control options are available.
A green bean is spongy and soft while a roasted bean is crunchy. The color, smell and density is changed by the roasting process. Chemical changes take place as beans are quickly brought to high temperatures. As soon as they reach a certain point, they are cooled down to stop the process. It is a matter of seconds between perfection and a ruined batch.
There are many variables that have to be taken into account in the roasting process. Some of these are the moisture content, the batch size, the start temperature and the cooling time. Times and measurements are taken before, during and after the roasting process and recorded.
The beans emit a cracking sound when they are heated. The beginning and end of the first crack and second crack as well as the length of time between the two are usually measured. This is used to determine timing for different roasts. Color changes are noted, the most significant one being when color turns to yellow and the browning process begins. The beans swell when heated but at the same time their weight is reduced.
Various adjustments can be made to better express the sweetness, body or acidity of a particular variety. What is called a roast profile is developed for the different varieties and this helps with consistency from batch to batch. Specialized names are given to favorite roasts. In general, they fall into the categories of light, medium, medium-dark or dark.
Coffees are coming into their own as complex and flavorful beverages. Companies, both large and small, are devoted to producing the best quality roasts and selling equipment for roasting. The perfect roast is very much a matter of personal taste. It is possible to find excellent roasts online and they come in types to suit many different tastes, varying from light and medium to medium-dark or dark. One can also shop for the most modern roasting machines, easily comparing types and prices.
The crude machines of the past vary greatly from the computerized versions available today but the basic principles are still the same. The bean is taken from its green state and roasted to release the flavors. Drum machines are commonly used and these work by rotating and causing the beans to tumble around with gas or electricity providing the heat source. Hot air machines are also used and beans are roasted on a currant of hot air.
Drum roasters vary in capacity and level of control. Commercial ones are designed for high-volume roasting across the entire color-development spectrum. Others offer the same capabilities but come in smaller, tabletop designs. Continuous monitoring tools and user-friendly controls ensure precise, consistent results. Manual, automatic and semiautomatic control options are available.
A green bean is spongy and soft while a roasted bean is crunchy. The color, smell and density is changed by the roasting process. Chemical changes take place as beans are quickly brought to high temperatures. As soon as they reach a certain point, they are cooled down to stop the process. It is a matter of seconds between perfection and a ruined batch.
There are many variables that have to be taken into account in the roasting process. Some of these are the moisture content, the batch size, the start temperature and the cooling time. Times and measurements are taken before, during and after the roasting process and recorded.
The beans emit a cracking sound when they are heated. The beginning and end of the first crack and second crack as well as the length of time between the two are usually measured. This is used to determine timing for different roasts. Color changes are noted, the most significant one being when color turns to yellow and the browning process begins. The beans swell when heated but at the same time their weight is reduced.
Various adjustments can be made to better express the sweetness, body or acidity of a particular variety. What is called a roast profile is developed for the different varieties and this helps with consistency from batch to batch. Specialized names are given to favorite roasts. In general, they fall into the categories of light, medium, medium-dark or dark.
Coffees are coming into their own as complex and flavorful beverages. Companies, both large and small, are devoted to producing the best quality roasts and selling equipment for roasting. The perfect roast is very much a matter of personal taste. It is possible to find excellent roasts online and they come in types to suit many different tastes, varying from light and medium to medium-dark or dark. One can also shop for the most modern roasting machines, easily comparing types and prices.
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