Optical readable code support and capsule for preparing a beverage having such code support providing an enhanced readable optical signal

A method of reading an optically readable code, the method comprising:

• rotating a capsule on an axis of rotation in a beverage producing device, the capsule comprising a beverage ingredient and an optically readable code support, the support comprising at least one sequence of symbols represented on the support, wherein the at least one sequence of symbols are essentially formed of a pattern of light-reflective surfaces and light-absorbing surfaces, the light-absorbing surfaces providing a lower light-reflective intensity than the light-reflective surfaces, the support comprises at least one base layer or structure extending continuously at least along the at least one sequence of symbols, and the light-absorbing surfaces are roughened surfaces having a higher rugosity than the light-reflective surfaces;
• sequentially reading each of the symbols by a reading arrangement of an external reading device while the capsule is rotating;
• supplying a liquid to the capsule while the capsule is rotating to form a centrifuged liquid;
• and
• delivering a beverage from the capsule, the beverage comprising the centrifuged liquid.