They studied the chemical properties of chrome yellow paint left in historic tubes from this time period.
他们研究了在这个时期留下来的过去的画笔上的铬黄颜料的化学属性。
The researchers found that a change in the oxidation state of the element chromium (from chromium 6 to chromium 3) was linked to the darkening of chrome yellow paint.
研究人员发现，铬元素的氧化物由六价铬转变为三价铬，这与画作中的铬黄色日趋变暗有关。
In fact, the chrome yellow chemical reaction occurred between the layers of varnish and paint.
实际上，铬黄的化学反应在光泽面和颜料面之间也会发生。
In fact, the chrome yellow chemical reaction occurred between the layers of varnish and paint.
实际上，铬黄的化学反应在光泽面和颜料面之间也会发生。
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