brew can be both bitter and weak. The
common propellor grinder smashes all the
bean pieces until the machine is stopped, no
matter how small the pieces get, so coarse and
medium grinds end up containing some fine
powder. More expensive burr grinders allow
small pieces to escape through grooves in the
grinding surfaces, and give a more even
particle size.
The Effects of Roasting on Coffee BeansWeight Loss of Roasted Coffee BeansDegree of Roast Weight Loss, %
Cinnamon
(375ºF/190ºC)12, mostly
moisture
Medium 13
City 15
Full
city16, half moisture and half bean
solids