I would like to discuss how many of you have ever ask about this issue. It is easy to become confused with the variety of coffees available based on size grades. Usually, the grade depends on the percentage of coffee that remains in a specific sieve. For example, Supremo coffee must be 95% above 17 screen and 5 % between 16 and 14 screens.

The preparation of many lots of coffees based on the size of the beans have two main reasons; the first one is to ease the process of roasting by making the lot more smooth and consistent. The second one is related to consumer presentation for coffees sold as whole bean (Not ground). Is any body else has another additional comment.

I believe there are different ways to assess the size of the beans but I am familiar with one that is very technical and methodical. In order to use this procedure it is necessary to acquire a minimum set of elements such as a set of sieves, a scale, a probe grain, plastic bags and labels. ….

Andres Castro
Portland Roasting