October 17, 2023

THE SCIENCE BEHIND PURPLE FIREWORKS

When the night sky is painted with a mesmerizing tapestry of colors during a fireworks display, the hue that often leaves us entranced is none other than the enchanting purple. The mystical and regal quality of purple fireworks is achieved through a delicate fusion of chemistry and pyrotechnic artistry.

Purple, a colour associated with royalty and mysticism, is not a common shade in nature. Creating it in fireworks involves a sophisticated blend of compounds carefully chosen for their ability to emit the desired spectral wavelength of light.

To craft the elusive purple hue, pyrotechnicians often rely on a combination of strontium (red) and copper (blue) compounds. Strontium compounds, like strontium nitrate or strontium carbonate, emit a vibrant red colour when ignited. When combined with copper compounds such as copper chloride or copper sulfate, which emit shades of blue, the result is a visual symphony that culminates in the elusive purple.

Achieving the perfect shade of purple involves a delicate balance. Too much copper can overpower the red tones and veer towards blue, while an excess of strontium might produce a pinkish hue. Pyrotechnicians meticulously experiment with different ratios and compositions to attain the desired richness of colour.

Temperature also plays a significant role in the creation of purple firework effects. The balance between the red and blue components shifts with variations in temperature, affecting the final color outcome. Pyrotechnic experts must consider factors such as the size of the firework shell, the altitude at which the display occurs, and the prevailing weather conditions.

Crafting purple fireworks is a true marriage of science and art. Pyrotechnicians meticulously engineer the chemical composition of each firework to ensure a breathtaking display that captivates audiences. Safety measures are paramount, as these compounds are volatile and require skilled handling.

In summery, the magical allure of purple fireworks is a testament to human ingenuity and creativity. By skillfully manipulating strontium and copper compounds and taking into account factors like temperature and composition, pyrotechnic experts create a symphony of colors that lights up the night sky with a royal and enchanting purple glow, leaving us spellbound and inspired.