Coffee is a food consumed after roasting raw green beans. In fact, in some cultures, green seeds can be consumed directly. However, it is mostly consumed roasted throughout the world. The temperature during roasting also changes the aromatic structure and flavor of the coffee. For this reason, the roasting degree in the coffee roasting machine should be adjusted carefully.
Coffee roasting machines operate in varying temperature ranges due to their technical structure. The roasting process is carried out by transferring the heat from a source such as electricity or natural gas to the drum or boiler. For example, GÜLMAK Nova series products include thermal roasting type. The devices roast for the desired time with the temperature determined on the control panel. Within the framework of these technical details, varying products such as Turkish coffee or espresso are obtained.
How to Determine Roasting Degree?
In commercial use, the roasting degree in a coffee roasting machine is determined specifically according to the type of coffee. Because other conditions as well as growing conditions determine the taste of coffee. In other words, the degree of roasting of the beans, the grinding method and the brewing method are also important. Features that have changed over many years have been determined for the coffee roasting process at the first point. Depending on these features, the coffee roasting machine temperature is determined.
Today, technological advances have been made for the coffee roasting process. These developments have led to professional coffee roasting machine products. The machines provided a technical and practical result instead of roasting green coffee beans over a fire. In this way, roasting at the right time and temperature can be achieved with much more precise measurements. Drum machines enable coffee to be roasted through contact with heat in the heated drum.
When using a drum coffee roasting machine, temperature determination is made in proportion to the roasting time. In this way, the ideal properties of coffee are revealed. Ideal features include;
The amount of moisture desired to be removed from coffee beans,
Volume gained from lost fat and sugar,
The amount of lost coffee bean water,
The final coffee bean color achieved by roasting,
The desired amount of oil to appear in coffee beans is included.
The ideal features listed enable the coffee to obtain names such as Turkish coffee, espresso or Colombian coffee. In this sense, clear temperature ranges can be used in coffee roasting processes.
What are the temperature ranges?
When using a coffee roasting machine, the roasting degree of the coffee is taken into consideration. Although each machine has different dimensions, values can be calculated for an average 10 kg machine. In this type of machine, 3 different roasting degrees are taken into account. In other words, processes such as light roasting, medium roasting or dark roasting can be done at varying temperatures.
When adjusting the heat settings of the coffee roasting machine, the mentioned roasting degrees are taken into consideration. The open roasting process should generally be chosen for varieties such as Colombian coffee. It is achieved by roasting the coffee between 170-180 0C without tasting bitter. Medium roasting degree should be done at a temperature between 180-200 0C. It is a grade chosen for many types of coffee. The resulting coffee also provides medium drinking properties. Generally, coffees with balanced taste, such as Kenyan and Brazilian coffees, are obtained.
The dark roasting process is carried out between 200-215 0C. It provides intense taste, especially for espresso. As it is known, there are roasting degrees for Turkish coffee in our country. For example, we have coffee varieties such as double roasted or bitter coffee. When using a drum coffee roasting machine, Turkish coffee beans can also be roasted. This roasting is carried out in different stages. For the Turkish coffee roasting stages,
Color change with yellowing,
Obtaining thickening with increasing heat,
Cracking of beans that lose moisture,
The aroma emerges with a good roasting,
It is applied to obtain a dark brown color with the final cracking.
Traditional methods can still be preferred at many points for Turkish coffee. However, GÜLMAK professional coffee roasting machines are also among the choices. High-tech, fully equipped coffee roasting machines can provide the results you want in this sense. Coffee roasting in drum machines can be easily achieved with the most precise adjustments.
