Glass Production
Neodymium compounds have been used in glassmaking since about 1927 when they were first introduced. When added to glass, Neodymium compounds tend to create a variety of tints ranging from pinkish to slightly reddish to purple and even to purplish. However, the hue changes based on the type of light it is viewed under. This change is caused by the fluorescent effects. Currently, Neodymium remains a popular additive to glass. It is also used for “coloring glasses (didymium glass) able to adsorb the yellow sodium glare of the flame. This kind of glass is used to protect the eyes of welders.” (“Neodymium - Nd”, par 2).