We learned that naturally oxidized copper is avaluablematerial，″ an Imperial Household Agency spokesman said.
据新华社电氧化铜由于其独一无二的蓝绿色，在日本被用作天然颜料。
There are many types of pigments for the production of printing inks, such as natural and manufactures inorganic pigments, synthetic organic pigments and carbon black.
制造油墨用的颜料有多种，例如：天然和人造无机颜料，合成有机颜料和碳黑。
A ketone, C10H6N4O2, that gives color to various natural yellow pigments.
核黄素一种用于制作各种天然黄色颜料的酮，C10H6N4O2
A natural brown earth containing ferric oxide and manganese oxides, used as pigment.
棕土含有红色氧化铁和氧化锰的天然棕色泥土，用作颜料
The natural tourmalines' color is diversity and its genesis is complexity.
天然电气石颜色多种多样,颜色成因非常复杂。
Carbon black: A fine, intensely black pigment obtained by burning natural gas or oil with restricted air supply. Used in the manufacture of ink.
碳黑:在缺乏空气的情况下，燃烧天然气或油产生的一种细面极黑的颜料。用来制造油墨。
Of course, pigment is not the only part of a fresco.
当然，颜料还不是画面的全部。
blue pigment made of powdered lapis lazuli.
由粉末状天青石制成的蓝色颜料。
Raw natural rubber--Colour index test
GB/T14796-1993天然生胶颜色指数测定法
"Oil paints are made by mixing dry pigment powder with refined linseed oil to a paste, which is then milled in order to disperse the pigment particles throughout the oil vehicle."
油画颜料由于颜料粉与精炼亚麻子油混合，然后加以碾磨，让颜料粉与油完全混合。
Fruit juice -- a purely natural health drink.
水果汁——纯天然保健饮料。
Pure natural Beverages are popular world-wide.
纯天然饮料，风靡世界。
"fossil fuels: coal, oil, and natural gas"
矿物燃料(煤、石油、天然气)
Every day he went out with his paints and his brushes and painted from morning to evening,
每天，他带着颜料和画笔出去，从早画到晚。
Everyday he painted till evening,
他每天都带着颜料和画笔出去，一直画到晚上，
A blue pigment made from powdered lapis lazuli.
深蓝青由粉末状天青石制成的蓝色颜料
People in prehistoric times created paints by grinding materials such as plants and clay into power and then adding water.
史前的人们制造颜料是将植物和泥土等原料磨成粉末，然后加水。
Watercolours are pigments ground with gum arabic and gall and thinned with water in use.
水彩颜料是由色料与阿拉伯树胶和胆汁碾磨，然后加水稀释而成。