Coffee Roasting

Coffee Roasting Definition - Roasting coffee transforms the chemical and physical properties of green coffee beans into roasted coffee products.


Roasting coffee is widely considered the most important process when producing coffee as it affects the taste and alters the strength. The roasting process changes the chemical properties as well as the appearance of the green beans coffee. The roasting process causes these beans to grow in size, change colour, taste, density and very noticeably the smell.

As the coffee is taken along the different stages of the roasting process, there are different activities that take place. Most coffee that you buy today, whether from Jurang, Nescafe or Tesco will most likely be roasted commercially on a large scale. However, it is becoming more and more popular for coffee lovers to roast themselves, giving them the ability to produce their exact desired taste, strength and also keep control over the freshness of the coffee beans.

Coffee Rasiting Process

Coffee Roasting Process

Once the green beans have been harvested, they are weighed and transferred to storage hoppers. These are then taken to the roastery. Coffee roasters are usually horizontal rotating drums that are heated from below and tumble the green coffee beans in a current of hot gases. Roasters typically operate at a temperature of 188 to 282 °C and normally green beans are roasted for anytime between 3 and 30 minutes.

The longer the beans are roasted for, the stronger the coffee will be. Have a look at our coffee strengths guide to find out more.

Fresh Roasted Ground Coffee

Fresh Ground Coffee

Roasted Coffee Packaging

Vacuum packaging has for long been the most commonly used form of coffee preservation. There are many different techniques and tools to try and extend the freshness and life of the roasted coffee. Many people now prefer to use airtight tins, canisters and foil-lined bags with pressure relief valves. These techniques operate on the basis that packing the coffee beans soon after roasting with some of the air in which many of the roasting aromas still present, means the coffee is kept fresher. If the coffee is to be ready ground, the coffee beans go through A coffee grinding process before being packed. Pressure relief valves operate in such a way that they only let air out of the pack and do not allow fresh air and oxygen into the pack before it is opened.

Perfect Coffee Blend

Jurang Fair Trade
Premier House, Manchester Road
Manchester Lancashire OL5 9AA United Kingdom
0800 993 0831