The same with two colors, the spectral characteristics of different pigments, build the two colors effect consistent, and spectral characteristics of different ink, and becomes a on ink metamerism.

• 拔取两栽颜色不异、平谱特征差别的颜料，天生两栽颜色成果分歧、而平谱特征差别的油墨，成为一差同色异谱油墨。