What is key to obtaining a good set of inked fingerprints?

To obtain a good set of inked fingerprints, having control of the person being printed is essential. This control allows the individual taking the fingerprints to position the fingers correctly and apply the appropriate pressure. It also helps to ensure that the person does not move unexpectedly during the printing process, which can lead to smudged or incomplete prints. When the person being printed is under control, either physically or through verbal guidance, it significantly increases the chances of capturing a clear and usable set of fingerprints.

In comparison, while high-quality ink contributes to clarity, and a calm atmosphere can help reduce anxiety, neither of these factors addresses the crucial need for direct control during the fingerprinting process. Maintaining a sterile environment is generally important in medical or laboratory settings but is less relevant to the quality of inked fingerprints in this context. Thus, control over the individual being printed is the key factor in ensuring an accurate and clear set of fingerprints.