The identification and analysis of fingerprints should begin with fingerprint collection.
The quality of collected fingerprints fundamentally determines the difficulty and likelihood of success of fingerprint identification and analysis.
The fingerprints on the painting frame have already been collected by Lu Chuan.
This time, Lu Chuan did not use the usual silver powder or the infrequently used copper powder but employed a magnetic adhesion method for collection.
This is because the material of the painting frame is comprised of composite panels pressed from fragmented wood and then coated with lacquer.
Compared to several commonly used fingerprint collection methods, magnetic adhesion is the most effective for collecting fingerprints from such surfaces, causing the least damage to the fingerprints.
Additionally, because of the twisting of fingers during transportation, many of the fingerprints on the frame have smudges.
