| 摘要 |
<p>: (in conjunction with the block diagram) To produce coffee extract, roasted coffee beans are broken and then subjected to a first hot-water extraction stage. The remaining roast coffee is then exposed to further secondary hot-water extraction. The secondary extract obtained is treated with a weakly basic ion exchanger, in such a way that, on the one hand, the pH value of the extract is increased, and on the other hand, substances detrimental to flavour are absorbed.</p> |
