The red pigments of purple sweetpotatoes were showed similar stable to purple rice red pigments, but higher than any other pigments tested when they are heated;

结果表明，紫甘薯红色素具有与其它几种红色素相似的理化稳定性，其热稳定性与紫米相似，但优于其它色素；

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Its good intermiscibility with other pigments, additives and auxiliaries, features of easy deconcentration and small screenings make it applicable for operation.

它与涂料中其他颜料、增料及助剂有良好的相溶性，易分散、筛余物小的特征，更适于生产操作。

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You'd have to know what pigments he used, in other words, what ingredients he used to make different colors of paint, because the ingredients used in paints and binding agents have changed over time.

你要知道他使用了什么颜料，换句话说，他用了什么原料来制造不同颜色的油漆，因为油漆中使用的原料和结合剂都随着时间的推移而改变。

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In 2011, an article in the same journal from a team led by the University of Antwerp's Koen Janssens reported that a pigment Van Gogh favoured called chrome yellow degraded when other, chromium-containing pigments were present.

BBC: Van Gogh's Flowers In A Blue Vase damage seen in X-rays

When Stone Age man produced their remarkable cave paintings they often left handprints on the walls produced by blowing pigments from one hand through a tube held by the other hand.

BBC: Cave handprint, Montpellier University