Solicitante: Council of Scientific and Industrial Research
N. de solicitud: US20040021566
N. de publicación: US7279036
The present invention provides a novel process for preparation of inorganic colourants from mixed rare earth compounds, which are directly obtained from the ore industry, without undergoing any separation, thereby enabling a cost reduction to the extend of 10-100 times. Colors ranging from brown, blue and green can be obtained by suitable doping with other metal ions.
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