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Neodymium Sesquioxide
This is a lanthanide rare earth oxide. It is used as a colorant and acts as a flux.The oxide is a blue/lavender powder, giving a good aqua color in most glaze bases at 1-2%. At 4-7% it gives a pleasant lavender/grape color that appears as a different color under different artificial light sources. It is very strongly affected by iron, particularly in oxidation, giving a reliable perfect neutral transparent gray. Avoid trace iron impurities to achieve the brightest blue and lavender colors.
Frit Softening Point: 2220C