Chasing the Peak: A Dimensional Matter

Experience shows that espresso coffee really sings when you can extract high concentration of solubles over a relatively short time. Achieving this is all about increasing the contact surface between the coffee and water. This helps transfer soluble and emulsifiable materials into the brew. Chemically, the finer the particles, the quicker the extraction. However, there is also a physical/mechanical need for the water to flow through the ground coffee bed, which becomes diffic

Coffee Under the Microscope III

So far we have looked at coffee through optical microscopes, which has allowed us to appreciate grind size, shape and even helped to calculate grind size distribution. Electron microscopy is designed to take us to a real close-up with the material of interest. Electron Microscopy, Plant Cells & Porosity Instead of light beams, it uses electron beams to create an image which can reveal details down to the nanometer (nm) range. Just to appreciate how small a nanometer is, think

Coffee Under the Microscope I

Microscope images of coffee are not only fascinating to look at, but also give us important information about coffee properties. I would like to introduce three microscopes that each give us a different new insight into what goes on inside the bean and the grinder. This time it’s all about a small, easy-to-use microscope that connects straight to your laptop. It’s not just great for playing around at home, but it's suitable for some real experimentation too! The Dino-Lite Han