The obtained tea extract is then concentrated or dried in a manner known per se, for example by spray drying, or freeze drying, optionally preceded by a concentration treatment, e.g. a reverse osmosis treatment.

• 然后把所得的茶叶提取物浓缩或是用一种已知的方法干燥,例如喷雾干燥或是冷冻干燥。在干燥之前,最好先进行一下浓缩如可逆渗透处理。