How should a plastic fingerprint be collected and preserved?

To effectively collect and preserve a plastic fingerprint, photographing and then collecting the entire object is the best practice. This method ensures both the capture of evidence in its original form through photography, which can be crucial for documentation and analysis, and the physical retrieval of the fingerprint itself. By collecting the entire object, you maintain the integrity of the print, as plastic fingerprints are typically three-dimensional impressions made in materials like wax, clay, or other soft substances.

This approach not only documents the location and context of the fingerprint but also preserves its detail for forensic analysis. In many cases, attempting to lift or manipulate the fingerprint directly could potentially damage it or alter its state, which is why collecting the object itself is critical.

Other methods, such as using a vacuum cleaner or simply spraying with water, could inadvertently destroy the fingerprint details or might not properly preserve the print. Wrapping the fingerprint in tissue paper and using an envelope may not provide the necessary protection or should not be the first method employed without prior documentation through photography.