经过调查,染纸中所用的国画颜料主要为藤黄、赭石、墨等;植物染料有橡碗子、茶叶、槐米、栀子等。
From the surveys , we learned about that the traditional Chinese pigments used are gamboge , ochre , ink and so on , and the vegetable dyes are acorn cup , tea , sophora flower bud and gardenia .