Lightcolored rosin ester with Gardner color 2-4 was prepared by reacting rosin with alcohol in the presence of a new CLC catalyst.

松香在新型催化剂（CLC）存在下与醇发生酯化反应，生成加纳色号2～4的浅色松香树脂。

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Single-bleaching lecithin with color 7 (Gardner) was obtained by addition of 3 percent of hydrogen peroxide.

添加3%的双氧水改善大豆浓缩磷脂色泽，可以得到色泽（加特纳色度）为7的单漂磷脂。

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