以云南大叶种晒青绿毛茶为原料,通过潮水和添加一定量不同外源物质进行固态发酵。结果表明,不同处理的茶叶外观色泽以及汤色均发生了显著的变化;添加葡萄糖、没食子酸、焦性没食子酸、邻苯二酚、甘氨酸以及混合使用葡萄糖与没食子酸处理的茶叶中,茶褐素的含量分别达到了6.99%、11.29%、10.22%、6.31%、9.25%和7.30%,显著高于对照干茶样（1.76%）和仅添加水的处理样（2.87%）;但有山梨酸钾存在时,样品中茶褐素的含量与对照差异极小。结果还表明,抗坏血酸氧化反应和茶叶内含成分对茶褐素的形成也有较大作用。
Sun-dried green tea prepared from the fresh leaves of Camellia sinensis var. assamica was used as its starting materials by solid state fermentation. Results showed that the appearance color and soup color value of fermented tea leaves with different treatments showed significant difference. The content of theabrownin in fermented tea leaves in addition of glucose, gallic acid, pyrogallol, pyrocatechol, glycine and mixtures of glucose and gallic acid is 6.99%, 11.29%, 10.22%, 6.31%, 9.25% and 7.30% respectively, and their content is higher than that in dried tea sample (control 1, 1.76%) and fermented sample (2.78%) only added with distilled water (control 2). It is found that there is no significant difference between the samples treated with glucose, gallic acid, pyrogallol, pyrocatechol and glycine as well as administering with potassium sorbate and the control. The results also showed that the ascorbic acid reaction and the components within tea leaves also enhance theabrownin production.
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