| 摘要 |
<p>Dried tea-leaves are aromatised by spraying with aroma oil in an O2-free atmos. The aromatised tea-leaves are packed in an O2-free atmos. Oxidn and degradation of the ethereal oils in aroma oils in suppressed. Spraying and packing take place esp in a gas which replaces air-O2 and is inert w.r.t the aroma-oil and its carriers. The O2-free atmos is generated esp by rinsing with the inert gas, e.g. N2 (prefd) or CO2. The O2-free atmos can contain a residual 2% O2 content, which affects neither oils nor fragrances. Pref aroma oi-propellant also consists of the air O2-replacing inert gas.</p> |
