220V Electric Coffee Roaster home hot air coffee bean roasting machine 200g 8-10mins roasting time

• The machine is now roasting the coffee and will continue to increase the bean temperature closer to the final roast level.

• During the roasting process, the beans will go through changes in color, size, and weight.

Color : As the bean temperature increases, the first noticeable difference is the darkening color from green to light brown then to dark brown with oils on the bean surface.

Note : Decaffeinated coffee will look brown before roasting due to the decaffeination process.

Size: As the bean is heated, the internal cell walls of the bean will expand from the heat and cause the bean to increase in size by nearly a third. This expanding of the bean is referred to as the "crack" and can be heard as a light snapping or cracking sound, typically occurring first around seven minutes and again near ten minutes (that is, the first crack and second crack).

Weight : Before roasting begins, the bean is considered "heavy" or "green" due to the moisture trapped inside. During the roasting process the moisture is driven out of the bean. Towards the end of the roast the beans will appear to be bouncing around the roast chamber more rapidly due to the "weight loss".

• About six to twelve minutes, the beans will reach the final roast level temperature at which time, turn off temperature swich. Fan is still working to let coffee bean cool down.