Ultrafine Coffee Grinding
Finer Than Fine
Ultrafine coffee grinding is a technology that requires a lot of know-how and precision. Neuhaus Neotec roll grinders set technical standards for this type of grinding.
For the preparation of Turkish mocca for example, the roasted coffee is crushed to an almost floury fineness. Ultrafine grinding takes it one step further - the roasted coffee is very finely ground so that there is no granular structure to be felt when rubbing the ground coffee between the fingers - it is simply ultrafine. Coffee with this grinding degree, however, is not only used pure but also in a mixture with instant coffee. A big American coffee shop chain has started using this technology and now other big manufacturers are following suit. As a result, there is an increasing demand for appropriate grinders that ensure such a fine grinding of the roasted bean.
With more than 40 years of experience in coffee grinding, Neuhaus Neotec offer roll grinders that represent state-of-the-art technology. The particle size of ultrafine grinding is approx. 50 µm, with the gap width between the special rolls being below 10 µ. With this process, a particularly fine and homogeneous ground product can be produced. Despite the high performance, the product to be ground hardly heats and does not lose its aroma thanks to special roll drives and high-capacity cooling during the grinding process.
A touch screen control system and a sensitive temperature monitoring system facilitate the control of the grinders.
The special roll geometry and surface design in combination with separate drives ensure an extremely precise adjustment of the grinding degree. Furthermore, built-ups which can occur when grinding fine coffee, can be overcome by using a special scraper system.
For an optimum preparation of the roasted coffee beans for ultrafine grinding, the residual moisture in the roasted coffee should be not too high.
Neuhaus Neotec sales manager Ralf Torenz recommends a residual moisture of max. 2 - 3 % for this type of grinding. The ideal coffee roast is dark, but it must not be roasted until coffee oil appears on the surface of the beans.
After roasting and degasification, the coffee is ground ultrafinely and immediately processed further and packed. There are no problems concerning the residual CO2 content, as due to the extremely increased surface of the ground product the carbon dioxide completely escapes almost instantaneously.
Different sizes of the Neuhaus Neotec roller mills for ultrafine grinding with capacities ranging from 100 to 1000 kg per hour are available.