In an attempt to deter counterfeiters, new features included a watermark of Franklin and optically variable ink that changes color when viewed at different angles.

为了防伪起见，新的特色包括一个弗兰克林的水印和光变油墨，从不同的角度可以看到不同的颜色。

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Ink composition comprising optically variable pigments, use of the composition, optically variable pigment and method of treating said pigment.

包含光变颜料的油墨组合物，该组合物的用途，光变颜料和处理该颜料的方法。

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