Nickel Sulfate (NiSO₄)
Nickel sulfate (NiSO₄) is a chemical compound that plays a unique decorative role in ceramics, primarily as a colorant in glazes and engobes. Its ability to generate soft green, bluish and metallic tones makes it a valuable material for artistic projects seeking to explore distinctive finishes. In combination with other oxides, it can produce a wider range of colors, such as greenish grays and duller shades, depending on firing conditions and glaze composition.
This material is highly reactive in the kiln, making it ideal for ceramists who wish to experiment with unusual textures and effects. However, its use requires caution due to its toxicity, especially in powder form. In transparent glazes, nickel sulfate can generate interesting color depths, while in opaque glazes it contributes to a homogeneous finish with complex shades.
Nickel sulfate is mainly used in oxidizing atmospheres, where its green tones remain more consistent. In reduction atmospheres, the colors can become duller, creating subtle but interesting effects.Interesting Fact
Although its use in ceramics is limited, nickel sulfate is widely used in other industries, such as the manufacture of rechargeable batteries and electroplating processes.Helpful Tip
Handle nickel sulfate with extreme caution, as it is toxic and can be harmful if inhaled or comes in contact with skin. Wear gloves, mask and work in a well-ventilated area. Always test glaze on small pieces before applying it to larger projects to understand how it interacts with other materials and firing conditions.
