Eggshells to the Rescue: A Green Way to Reveal Hidden Fingerprints

Forensic science is getting a green makeover. Scientists have discovered an innovative way to use waste chicken eggshells to develop fingerprints on challenging surfaces, even after prolonged exposure to water. This new method is not only eco-friendly but also highly effective.

The Science Behind the Solution

Eggshells are primarily composed of calcium carbonate, a natural and safe material. Researchers ground these eggshells into a fine powder and combined them with saponin, a natural soap-like substance, and methylene blue, a blue dye. This mixture was then tested on various surfaces, including glass, metal, and different plastics.

Testing the Method

The team wanted to determine if this eggshell-based powder could reveal fingerprints that had been submerged in water for five days. The results were promising: the fingerprints were clear and easy to see, particularly on glass and metal. Independent experts graded the fingerprints, with most rated good to excellent.

Safety and Sustainability

The scientists analyzed the powder's composition and adhesion to fingerprints. They found that the calcium carbonate in eggshells worked exceptionally well for this purpose. Additionally, the powder left no harmful chemicals behind, making it a safe and sustainable choice.

A Win-Win Solution

This new method offers multiple benefits:

• Cheaper than traditional methods
• Safer and non-toxic
• Environmentally responsible
• Supports a circular economy by repurposing waste

The Future of Forensic Science

In the future, this eco-friendly approach could become a standard in forensic science. It provides law enforcement with a reliable, non-toxic, and environmentally responsible tool for revealing fingerprints, even in challenging conditions.