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。
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。
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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